/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-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:23:24,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:23:24,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:23:24,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:23:24,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:23:24,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:23:24,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:23:24,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:23:24,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:23:24,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:23:24,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:23:24,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:23:24,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:23:24,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:23:24,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:23:24,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:23:24,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:23:24,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:23:24,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:23:24,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:23:24,482 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 12:23:24,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:23:24,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:23:24,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:23:24,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:23:24,507 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:23:24,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:23:24,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:23:24,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:23:24,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:23:24,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:23:24,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:23:24,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:23:24,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:23:24,508 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:23:24,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:23:24,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:23:24,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:23:24,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:23:24,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:23:24,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:23:24,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:23:24,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:23:24,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:23:24,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:23:24,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:23:24,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:23:24,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:23:24,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:23:24,509 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:23:24,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:23:24,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:23:24,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:23:24,755 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:23:24,755 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:23:24,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-05-02 12:23:24,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a0cdc7e8/c915faa6e36a4bbaa624590bd1fb45f0/FLAGad3bb6d6a [2021-05-02 12:23:25,186 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:23:25,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-05-02 12:23:25,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a0cdc7e8/c915faa6e36a4bbaa624590bd1fb45f0/FLAGad3bb6d6a [2021-05-02 12:23:25,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a0cdc7e8/c915faa6e36a4bbaa624590bd1fb45f0 [2021-05-02 12:23:25,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:23:25,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:23:25,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:23:25,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:23:25,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:23:25,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:23:25" (1/1) ... [2021-05-02 12:23:25,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f63172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25, skipping insertion in model container [2021-05-02 12:23:25,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:23:25" (1/1) ... [2021-05-02 12:23:25,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:23:25,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:23:25,738 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-invgen/apache-get-tag.i[893,906] [2021-05-02 12:23:25,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:23:25,772 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:23:25,786 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-invgen/apache-get-tag.i[893,906] [2021-05-02 12:23:25,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:23:25,818 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:23:25,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25 WrapperNode [2021-05-02 12:23:25,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:23:25,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:23:25,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:23:25,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:23:25,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25" (1/1) ... [2021-05-02 12:23:25,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25" (1/1) ... [2021-05-02 12:23:25,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25" (1/1) ... [2021-05-02 12:23:25,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25" (1/1) ... [2021-05-02 12:23:25,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25" (1/1) ... [2021-05-02 12:23:25,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25" (1/1) ... [2021-05-02 12:23:25,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25" (1/1) ... [2021-05-02 12:23:25,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:23:25,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:23:25,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:23:25,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:23:25,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25" (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 12:23:25,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:23:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:23:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:23:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:23:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:23:25,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:23:25,927 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:23:25,927 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:23:25,927 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:23:25,927 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:23:25,927 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:23:25,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:23:25,928 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:23:25,928 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:23:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:23:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:23:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:23:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:23:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:23:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:23:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:23:25,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:23:26,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:23:26,176 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 12:23:26,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:23:26 BoogieIcfgContainer [2021-05-02 12:23:26,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:23:26,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:23:26,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:23:26,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:23:26,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:23:25" (1/3) ... [2021-05-02 12:23:26,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5ef393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:23:26, skipping insertion in model container [2021-05-02 12:23:26,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:23:25" (2/3) ... [2021-05-02 12:23:26,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5ef393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:23:26, skipping insertion in model container [2021-05-02 12:23:26,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:23:26" (3/3) ... [2021-05-02 12:23:26,211 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2021-05-02 12:23:26,220 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:23:26,223 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:23:26,234 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:23:26,248 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:23:26,248 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:23:26,248 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:23:26,248 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:23:26,249 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:23:26,249 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:23:26,249 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:23:26,249 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:23:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 25 states have (on average 1.56) internal successors, (39), 30 states have internal predecessors, (39), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 12:23:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 12:23:26,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:23:26,263 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:23:26,263 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:23:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:23:26,267 INFO L82 PathProgramCache]: Analyzing trace with hash 343233864, now seen corresponding path program 1 times [2021-05-02 12:23:26,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:23:26,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137693378] [2021-05-02 12:23:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:23:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:26,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:23:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:26,386 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 12:23:26,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:23:26,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137693378] [2021-05-02 12:23:26,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137693378] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:23:26,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:23:26,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:23:26,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430376038] [2021-05-02 12:23:26,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:23:26,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:23:26,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:23:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:23:26,412 INFO L87 Difference]: Start difference. First operand has 48 states, 25 states have (on average 1.56) internal successors, (39), 30 states have internal predecessors, (39), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 12:23:26,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:23:26,543 INFO L93 Difference]: Finished difference Result 88 states and 157 transitions. [2021-05-02 12:23:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:23:26,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 13 [2021-05-02 12:23:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:23:26,549 INFO L225 Difference]: With dead ends: 88 [2021-05-02 12:23:26,549 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 12:23:26,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:23:26,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 12:23:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 12:23:26,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 12:23:26,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2021-05-02 12:23:26,580 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 13 [2021-05-02 12:23:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:23:26,580 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2021-05-02 12:23:26,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 12:23:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2021-05-02 12:23:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:23:26,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:23:26,581 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:23:26,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:23:26,581 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:23:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:23:26,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1474362961, now seen corresponding path program 1 times [2021-05-02 12:23:26,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:23:26,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376970406] [2021-05-02 12:23:26,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:23:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:23:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:26,666 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 12:23:26,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:23:26,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376970406] [2021-05-02 12:23:26,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376970406] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:23:26,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:23:26,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 12:23:26,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233757637] [2021-05-02 12:23:26,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:23:26,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:23:26,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:23:26,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:23:26,669 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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 12:23:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:23:26,883 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-02 12:23:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:23:26,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2021-05-02 12:23:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:23:26,886 INFO L225 Difference]: With dead ends: 49 [2021-05-02 12:23:26,886 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 12:23:26,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:23:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 12:23:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 12:23:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.32) internal successors, (33), 29 states have internal predecessors, (33), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 12:23:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-05-02 12:23:26,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 14 [2021-05-02 12:23:26,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:23:26,895 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-05-02 12:23:26,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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 12:23:26,895 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-05-02 12:23:26,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 12:23:26,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:23:26,896 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:23:26,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:23:26,896 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:23:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:23:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1520724128, now seen corresponding path program 1 times [2021-05-02 12:23:26,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:23:26,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529139997] [2021-05-02 12:23:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:23:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:23:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-02 12:23:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:23:27,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:23:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529139997] [2021-05-02 12:23:27,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529139997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:23:27,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:23:27,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 12:23:27,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563953749] [2021-05-02 12:23:27,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:23:27,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:23:27,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:23:27,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:23:27,012 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:23:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:23:27,245 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2021-05-02 12:23:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:23:27,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-05-02 12:23:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:23:27,247 INFO L225 Difference]: With dead ends: 62 [2021-05-02 12:23:27,248 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 12:23:27,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:23:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 12:23:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-05-02 12:23:27,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 12:23:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-05-02 12:23:27,263 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 19 [2021-05-02 12:23:27,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:23:27,263 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-05-02 12:23:27,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:23:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-05-02 12:23:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 12:23:27,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:23:27,264 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:23:27,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 12:23:27,264 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:23:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:23:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1868871511, now seen corresponding path program 1 times [2021-05-02 12:23:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:23:27,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803573734] [2021-05-02 12:23:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:23:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:23:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 12:23:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:23:27,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:23:27,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803573734] [2021-05-02 12:23:27,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803573734] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:23:27,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:23:27,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 12:23:27,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553215722] [2021-05-02 12:23:27,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:23:27,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:23:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:23:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:23:27,360 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:23:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:23:27,682 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-02 12:23:27,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:23:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 12:23:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:23:27,683 INFO L225 Difference]: With dead ends: 60 [2021-05-02 12:23:27,683 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 12:23:27,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:23:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 12:23:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-05-02 12:23:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 12:23:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-02 12:23:27,689 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 20 [2021-05-02 12:23:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:23:27,689 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-02 12:23:27,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:23:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-02 12:23:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 12:23:27,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:23:27,691 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:23:27,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 12:23:27,691 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:23:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:23:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1843501053, now seen corresponding path program 1 times [2021-05-02 12:23:27,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:23:27,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458979260] [2021-05-02 12:23:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:23:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:23:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 12:23:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 12:23:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 12:23:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 12:23:27,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:23:27,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458979260] [2021-05-02 12:23:27,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458979260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:23:27,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389389170] [2021-05-02 12:23:27,834 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 12:23:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:23:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 12:23:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:23:27,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:27,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:23:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 12:23:28,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389389170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:23:28,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:23:28,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-02 12:23:28,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265168079] [2021-05-02 12:23:28,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 12:23:28,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:23:28,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 12:23:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:23:28,187 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 12:23:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:23:28,698 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2021-05-02 12:23:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 12:23:28,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 34 [2021-05-02 12:23:28,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:23:28,699 INFO L225 Difference]: With dead ends: 80 [2021-05-02 12:23:28,699 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:23:28,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:23:28,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:23:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:23:28,703 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 12:23:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:23:28,703 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2021-05-02 12:23:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:23:28,703 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:23:28,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 12:23:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:23:28,704 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:23:28,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:23:28,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:23:29,428 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:23:29,429 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:23:29,429 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:23:29,429 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:23:29,429 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 12:23:29,429 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:23:29,429 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:23:29,429 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:23:29,429 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:23:29,429 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:23:29,429 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:23:29,429 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:23:29,429 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:23:29,429 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L60(line 60) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L60-1(line 60) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-02 12:23:29,430 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 77) no Hoare annotation was computed. [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L56(line 56) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L56-1(line 56) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L48-2(lines 48 72) the Hoare annotation is: (and (<= 0 main_~t~0) (< 0 main_~tagbuf_len~0) (< main_~t~0 (+ main_~tagbuf_len~0 1))) [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L48-3(lines 48 72) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L73(line 73) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L69(line 69) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L32-2(lines 32 44) the Hoare annotation is: (and (<= 0 main_~t~0) (< main_~t~0 (+ main_~tagbuf_len~0 1))) [2021-05-02 12:23:29,430 INFO L194 CegarLoopUtils]: At program point L32-3(lines 32 44) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,430 INFO L198 CegarLoopUtils]: For program point L57(line 57) no Hoare annotation was computed. [2021-05-02 12:23:29,430 INFO L198 CegarLoopUtils]: For program point L49(lines 49 53) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,431 INFO L201 CegarLoopUtils]: At program point L74(lines 25 77) the Hoare annotation is: true [2021-05-02 12:23:29,431 INFO L194 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,431 INFO L194 CegarLoopUtils]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point L70(line 70) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point L66(lines 66 68) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point L33(lines 33 37) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point L29-1(line 29) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point L54(lines 54 68) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L194 CegarLoopUtils]: At program point L54-1(lines 54 68) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2021-05-02 12:23:29,431 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-02 12:23:29,431 INFO L194 CegarLoopUtils]: At program point L50-1(line 50) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 77) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point L42(line 42) no Hoare annotation was computed. [2021-05-02 12:23:29,431 INFO L198 CegarLoopUtils]: For program point L38(lines 38 40) no Hoare annotation was computed. [2021-05-02 12:23:29,432 INFO L194 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-02 12:23:29,432 INFO L194 CegarLoopUtils]: At program point L34-1(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2021-05-02 12:23:29,432 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 77) the Hoare annotation is: true [2021-05-02 12:23:29,432 INFO L198 CegarLoopUtils]: For program point L59(lines 59 63) no Hoare annotation was computed. [2021-05-02 12:23:29,432 INFO L198 CegarLoopUtils]: For program point L55(lines 55 64) no Hoare annotation was computed. [2021-05-02 12:23:29,432 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:23:29,432 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:23:29,432 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:23:29,432 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:23:29,432 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:23:29,432 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:23:29,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:23:29 BoogieIcfgContainer [2021-05-02 12:23:29,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:23:29,442 INFO L168 Benchmark]: Toolchain (without parser) took 3842.63 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 153.9 MB in the beginning and 120.7 MB in the end (delta: 33.2 MB). Peak memory consumption was 113.6 MB. Max. memory is 8.0 GB. [2021-05-02 12:23:29,442 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 188.7 MB. Free memory is still 170.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:23:29,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.04 ms. Allocated memory is still 188.7 MB. Free memory was 153.7 MB in the beginning and 171.0 MB in the end (delta: -17.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. [2021-05-02 12:23:29,443 INFO L168 Benchmark]: Boogie Preprocessor took 34.98 ms. Allocated memory is still 188.7 MB. Free memory was 171.0 MB in the beginning and 169.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:23:29,443 INFO L168 Benchmark]: RCFGBuilder took 322.64 ms. Allocated memory is still 188.7 MB. Free memory was 169.6 MB in the beginning and 151.3 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-05-02 12:23:29,443 INFO L168 Benchmark]: TraceAbstraction took 3263.36 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 150.7 MB in the beginning and 120.7 MB in the end (delta: 30.0 MB). Peak memory consumption was 111.3 MB. Max. memory is 8.0 GB. [2021-05-02 12:23:29,444 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 188.7 MB. Free memory is still 170.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 218.04 ms. Allocated memory is still 188.7 MB. Free memory was 153.7 MB in the beginning and 171.0 MB in the end (delta: -17.3 MB). Peak memory consumption was 10.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.98 ms. Allocated memory is still 188.7 MB. Free memory was 171.0 MB in the beginning and 169.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 322.64 ms. Allocated memory is still 188.7 MB. Free memory was 169.6 MB in the beginning and 151.3 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3263.36 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 150.7 MB in the beginning and 120.7 MB in the end (delta: 30.0 MB). Peak memory consumption was 111.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2675.4ms, OverallIterations: 5, TraceHistogramMax: 4, EmptinessCheckTime: 8.0ms, AutomataDifference: 1456.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 505.9ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 194 SDtfs, 296 SDslu, 223 SDs, 0 SdLazy, 747 SolverSat, 385 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 669.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 693.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=4, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 47.8ms AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 24 LocationsWithAnnotation, 69 PreInvPairs, 105 NumberOfFragments, 203 HoareAnnotationTreeSize, 69 FomulaSimplifications, 993 FormulaSimplificationTreeSizeReduction, 104.2ms HoareSimplificationTime, 24 FomulaSimplificationsInter, 1344 FormulaSimplificationTreeSizeReductionInter, 389.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 16.7ms SsaConstructionTime, 74.6ms SatisfiabilityAnalysisTime, 728.9ms InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 493 SizeOfPredicates, 3 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 32/46 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: 32]: Loop Invariant Derived loop invariant: 0 <= t && t < tagbuf_len + 1 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: (0 <= t && 0 < tagbuf_len) && t < tagbuf_len + 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...