/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:06:59,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:06:59,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:06:59,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:06:59,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:06:59,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:06:59,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:06:59,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:06:59,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:06:59,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:06:59,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:06:59,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:06:59,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:06:59,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:06:59,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:06:59,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:06:59,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:06:59,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:06:59,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:06:59,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:06:59,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:06:59,280 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:06:59,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:06:59,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:06:59,284 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:06:59,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:06:59,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:06:59,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:06:59,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:06:59,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:06:59,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:06:59,286 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:06:59,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:06:59,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:06:59,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:06:59,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:06:59,287 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:06:59,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:06:59,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:06:59,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:06:59,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:06:59,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:06:59,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:06:59,288 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:06:59,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:06:59,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:06:59,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:06:59,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:06:59,794 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:06:59,796 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2021-02-23 18:06:59,896 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f642e166/6469302c18a249f1bcf7cf8d63b149f6/FLAGa340a5659 [2021-02-23 18:07:00,635 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:07:00,637 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c [2021-02-23 18:07:00,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f642e166/6469302c18a249f1bcf7cf8d63b149f6/FLAGa340a5659 [2021-02-23 18:07:00,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f642e166/6469302c18a249f1bcf7cf8d63b149f6 [2021-02-23 18:07:00,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:07:01,006 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:07:01,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:07:01,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:07:01,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:07:01,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:07:00" (1/1) ... [2021-02-23 18:07:01,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36dff571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01, skipping insertion in model container [2021-02-23 18:07:01,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:07:00" (1/1) ... [2021-02-23 18:07:01,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:07:01,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:07:01,375 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c[576,589] [2021-02-23 18:07:01,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:07:01,409 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:07:01,439 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c[576,589] [2021-02-23 18:07:01,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:07:01,467 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:07:01,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01 WrapperNode [2021-02-23 18:07:01,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:07:01,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:07:01,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:07:01,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:07:01,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01" (1/1) ... [2021-02-23 18:07:01,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01" (1/1) ... [2021-02-23 18:07:01,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01" (1/1) ... [2021-02-23 18:07:01,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01" (1/1) ... [2021-02-23 18:07:01,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01" (1/1) ... [2021-02-23 18:07:01,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01" (1/1) ... [2021-02-23 18:07:01,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01" (1/1) ... [2021-02-23 18:07:01,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:07:01,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:07:01,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:07:01,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:07:01,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01" (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 [2021-02-23 18:07:01,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:07:01,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:07:01,665 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:07:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:07:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:07:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:07:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:07:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:07:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:07:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:07:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:07:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:07:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:07:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:07:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:07:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:07:02,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:07:02,074 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 18:07:02,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:07:02 BoogieIcfgContainer [2021-02-23 18:07:02,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:07:02,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:07:02,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:07:02,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:07:02,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:07:00" (1/3) ... [2021-02-23 18:07:02,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a67827e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:07:02, skipping insertion in model container [2021-02-23 18:07:02,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:01" (2/3) ... [2021-02-23 18:07:02,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a67827e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:07:02, skipping insertion in model container [2021-02-23 18:07:02,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:07:02" (3/3) ... [2021-02-23 18:07:02,111 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-2.c [2021-02-23 18:07:02,123 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:07:02,130 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:07:02,239 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:07:02,297 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:07:02,298 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:07:02,298 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:07:02,298 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:07:02,298 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:07:02,298 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:07:02,299 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:07:02,299 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:07:02,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-02-23 18:07:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 18:07:02,352 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:07:02,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:07:02,354 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:07:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:07:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1684913090, now seen corresponding path program 1 times [2021-02-23 18:07:02,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:07:02,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529806294] [2021-02-23 18:07:02,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:07:02,530 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:07:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:02,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:02,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:02,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:02,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:07:02,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:02,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:07:03,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:03,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:03,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:07:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:03,125 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:03,126 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:07:03,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529806294] [2021-02-23 18:07:03,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:07:03,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:07:03,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076364829] [2021-02-23 18:07:03,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:07:03,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:07:03,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:07:03,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:07:03,178 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 5 states. [2021-02-23 18:07:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:07:03,476 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-02-23 18:07:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 18:07:03,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2021-02-23 18:07:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:07:03,495 INFO L225 Difference]: With dead ends: 89 [2021-02-23 18:07:03,495 INFO L226 Difference]: Without dead ends: 46 [2021-02-23 18:07:03,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:07:03,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-02-23 18:07:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-02-23 18:07:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-23 18:07:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-02-23 18:07:03,598 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2021-02-23 18:07:03,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:07:03,599 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-02-23 18:07:03,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:07:03,599 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-02-23 18:07:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-23 18:07:03,602 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:07:03,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:07:03,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:07:03,603 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:07:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:07:03,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1911061662, now seen corresponding path program 1 times [2021-02-23 18:07:03,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:07:03,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187200920] [2021-02-23 18:07:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:07:03,614 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:07:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:03,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:03,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:03,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:03,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 18:07:03,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:03,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:03,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:07:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:03,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:03,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:07:03,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187200920] [2021-02-23 18:07:03,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:07:03,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:07:03,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331698068] [2021-02-23 18:07:03,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:07:03,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:07:03,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:07:03,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:07:03,771 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2021-02-23 18:07:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:07:03,909 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-02-23 18:07:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:07:03,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-23 18:07:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:07:03,913 INFO L225 Difference]: With dead ends: 42 [2021-02-23 18:07:03,914 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 18:07:03,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:07:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 18:07:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-23 18:07:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-23 18:07:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-02-23 18:07:03,941 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2021-02-23 18:07:03,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:07:03,943 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-02-23 18:07:03,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:07:03,944 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-02-23 18:07:03,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 18:07:03,947 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:07:03,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:07:03,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:07:03,953 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:07:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:07:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2041206465, now seen corresponding path program 1 times [2021-02-23 18:07:03,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:07:03,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874329150] [2021-02-23 18:07:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:07:03,973 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:07:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:04,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:04,089 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,090 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:07:04,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:07:04,111 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,113 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:07:04,123 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:07:04,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:07:04,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 18:07:04,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:04,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:07:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:04,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:07:04,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874329150] [2021-02-23 18:07:04,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:07:04,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-23 18:07:04,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048358483] [2021-02-23 18:07:04,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-23 18:07:04,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:07:04,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-23 18:07:04,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-23 18:07:04,208 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2021-02-23 18:07:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:07:04,414 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-02-23 18:07:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-23 18:07:04,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2021-02-23 18:07:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:07:04,416 INFO L225 Difference]: With dead ends: 46 [2021-02-23 18:07:04,416 INFO L226 Difference]: Without dead ends: 32 [2021-02-23 18:07:04,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-02-23 18:07:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-23 18:07:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-02-23 18:07:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-23 18:07:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 31 transitions. [2021-02-23 18:07:04,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 31 transitions. Word has length 31 [2021-02-23 18:07:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:07:04,427 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 31 transitions. [2021-02-23 18:07:04,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-23 18:07:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 31 transitions. [2021-02-23 18:07:04,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 18:07:04,428 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:07:04,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:07:04,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:07:04,429 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:07:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:07:04,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1860060673, now seen corresponding path program 1 times [2021-02-23 18:07:04,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:07:04,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231572132] [2021-02-23 18:07:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:07:04,433 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:07:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:04,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:04,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:07:04,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:07:04,525 WARN L141 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size [2021-02-23 18:07:04,527 WARN L147 QuantifierPusher]: treesize reduction 16, result has 55.6 percent of original size 20 [2021-02-23 18:07:04,549 WARN L141 QuantifierPusher]: treesize reduction 16, result has 65.2 percent of original size [2021-02-23 18:07:04,552 WARN L147 QuantifierPusher]: treesize reduction 16, result has 65.2 percent of original size 30 [2021-02-23 18:07:04,582 WARN L141 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size [2021-02-23 18:07:04,583 WARN L147 QuantifierPusher]: treesize reduction 14, result has 39.1 percent of original size 9 [2021-02-23 18:07:04,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:07:04,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-23 18:07:04,609 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:04,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:07:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:04,649 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:04,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:07:04,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231572132] [2021-02-23 18:07:04,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:07:04,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 18:07:04,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855625667] [2021-02-23 18:07:04,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 18:07:04,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:07:04,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 18:07:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:07:04,658 INFO L87 Difference]: Start difference. First operand 32 states and 31 transitions. Second operand 10 states. [2021-02-23 18:07:04,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:07:04,810 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions. [2021-02-23 18:07:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 18:07:04,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-02-23 18:07:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:07:04,811 INFO L225 Difference]: With dead ends: 32 [2021-02-23 18:07:04,811 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 18:07:04,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-02-23 18:07:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 18:07:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 18:07:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 18:07:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 18:07:04,813 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-02-23 18:07:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:07:04,813 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 18:07:04,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 18:07:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 18:07:04,814 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 18:07:04,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:07:04,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 18:07:05,150 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 18:07:05,151 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 18:07:05,151 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 18:07:05,151 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 18:07:05,152 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 18:07:05,152 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 18:07:05,152 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 18:07:05,153 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 18:07:05,158 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 18:07:05,158 INFO L185 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)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 18:07:05,158 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 18:07:05,158 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 18:07:05,159 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 18:07:05,159 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 18:07:05,160 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 18:07:05,160 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 18:07:05,160 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 18:07:05,160 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 12 30) the Hoare annotation is: true [2021-02-23 18:07:05,160 INFO L185 CegarLoopUtils]: At program point L23(lines 13 30) the Hoare annotation is: false [2021-02-23 18:07:05,161 INFO L185 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 18:07:05,161 INFO L185 CegarLoopUtils]: At program point L15-1(line 15) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 18:07:05,161 INFO L185 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: false [2021-02-23 18:07:05,161 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 18:07:05,162 INFO L185 CegarLoopUtils]: At program point L20-1(lines 17 21) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) .cse1) (and .cse0 .cse1 (= |main_~#d1~0.base| main_~pd~0.base)))) [2021-02-23 18:07:05,162 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 18:07:05,163 INFO L185 CegarLoopUtils]: At program point L16-1(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 18:07:05,163 INFO L185 CegarLoopUtils]: At program point L16-3(line 16) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 18:07:05,165 INFO L185 CegarLoopUtils]: At program point L16-4(line 16) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_#t~ite8.offset| 0) (= |main_#t~ite8.base| |main_~#d2~0.base|) .cse1) (and (= |main_~#d1~0.offset| |main_#t~ite8.offset|) .cse0 (= |main_~#d1~0.base| |main_#t~ite8.base|) .cse1))) [2021-02-23 18:07:05,166 INFO L185 CegarLoopUtils]: At program point L16-5(line 16) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_#t~ite8.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= |main_#t~ite8.base| |main_~#d2~0.base|) .cse1) (and (= |main_~#d1~0.offset| |main_#t~ite8.offset|) .cse0 (= |main_~#d1~0.offset| main_~pd~0.offset) (= |main_~#d1~0.base| |main_#t~ite8.base|) .cse1 (= |main_~#d1~0.base| main_~pd~0.base)))) [2021-02-23 18:07:05,166 INFO L185 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: false [2021-02-23 18:07:05,166 INFO L185 CegarLoopUtils]: At program point L17(lines 17 21) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d1~0.offset| main_~pd~0.offset) .cse1 (= |main_~#d1~0.base| main_~pd~0.base)) (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) .cse1))) [2021-02-23 18:07:05,166 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 12 30) the Hoare annotation is: true [2021-02-23 18:07:05,166 INFO L185 CegarLoopUtils]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 28) the Hoare annotation is: false [2021-02-23 18:07:05,167 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 12 30) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2021-02-23 18:07:05,167 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-02-23 18:07:05,167 INFO L185 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: (let ((.cse0 (= (select |#valid| |main_~#d1~0.base|) 1)) (.cse1 (not (= |main_~#d1~0.base| |main_~#d2~0.base|)))) (or (and .cse0 (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) .cse1) (and .cse0 .cse1 (= |main_~#d1~0.base| main_~pd~0.base) (not |main_#t~short10|)))) [2021-02-23 18:07:05,167 INFO L185 CegarLoopUtils]: At program point L22-1(line 22) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 18:07:05,168 INFO L185 CegarLoopUtils]: At program point L22-2(line 22) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (= |main_#t~mem9| 0) (= |main_~#d2~0.offset| main_~pd~0.offset) (= main_~pd~0.base |main_~#d2~0.base|) (= (select (select |#memory_int| |main_~#d2~0.base|) (+ |main_~#d2~0.offset| 4)) 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 18:07:05,168 INFO L185 CegarLoopUtils]: At program point L18(line 18) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d1~0.offset| main_~pd~0.offset) (not (= |main_~#d1~0.base| |main_~#d2~0.base|)) (= |main_~#d1~0.base| main_~pd~0.base)) [2021-02-23 18:07:05,168 INFO L185 CegarLoopUtils]: At program point L22-4(lines 22 24) the Hoare annotation is: (not |main_#t~short10|) [2021-02-23 18:07:05,168 INFO L185 CegarLoopUtils]: At program point L22-5(line 22) the Hoare annotation is: false [2021-02-23 18:07:05,169 INFO L185 CegarLoopUtils]: At program point L22-6(line 22) the Hoare annotation is: false [2021-02-23 18:07:05,169 INFO L192 CegarLoopUtils]: At program point L22-7(line 22) the Hoare annotation is: true [2021-02-23 18:07:05,169 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (= (select |#valid| |main_~#d1~0.base|) 1) [2021-02-23 18:07:05,169 INFO L192 CegarLoopUtils]: At program point L22-8(line 22) the Hoare annotation is: true [2021-02-23 18:07:05,169 INFO L185 CegarLoopUtils]: At program point L14-1(line 14) the Hoare annotation is: (and (= (select |#valid| |main_~#d1~0.base|) 1) (= |main_~#d2~0.offset| 0) (not (= |main_~#d1~0.base| |main_~#d2~0.base|))) [2021-02-23 18:07:05,170 INFO L192 CegarLoopUtils]: At program point L14-2(line 14) the Hoare annotation is: true [2021-02-23 18:07:05,170 INFO L192 CegarLoopUtils]: At program point L14-3(line 14) the Hoare annotation is: true [2021-02-23 18:07:05,170 INFO L192 CegarLoopUtils]: At program point L14-4(line 14) the Hoare annotation is: true [2021-02-23 18:07:05,170 INFO L192 CegarLoopUtils]: At program point L14-5(line 14) the Hoare annotation is: true [2021-02-23 18:07:05,170 INFO L185 CegarLoopUtils]: At program point L14-6(line 14) the Hoare annotation is: false [2021-02-23 18:07:05,170 INFO L185 CegarLoopUtils]: At program point L14-7(line 14) the Hoare annotation is: false [2021-02-23 18:07:05,171 INFO L185 CegarLoopUtils]: At program point L14-8(line 14) the Hoare annotation is: false [2021-02-23 18:07:05,171 INFO L185 CegarLoopUtils]: At program point L14-9(line 14) the Hoare annotation is: false [2021-02-23 18:07:05,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:07:05 BoogieIcfgContainer [2021-02-23 18:07:05,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:07:05,196 INFO L168 Benchmark]: Toolchain (without parser) took 4196.22 ms. Allocated memory was 154.1 MB in the beginning and 186.6 MB in the end (delta: 32.5 MB). Free memory was 130.5 MB in the beginning and 156.2 MB in the end (delta: -25.7 MB). Peak memory consumption was 101.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:05,197 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 154.1 MB. Free memory was 126.8 MB in the beginning and 126.4 MB in the end (delta: 419.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:07:05,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 459.61 ms. Allocated memory is still 154.1 MB. Free memory was 129.5 MB in the beginning and 120.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:05,203 INFO L168 Benchmark]: Boogie Preprocessor took 69.66 ms. Allocated memory is still 154.1 MB. Free memory was 120.1 MB in the beginning and 118.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:05,208 INFO L168 Benchmark]: RCFGBuilder took 538.21 ms. Allocated memory is still 154.1 MB. Free memory was 118.6 MB in the beginning and 102.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:05,211 INFO L168 Benchmark]: TraceAbstraction took 3102.90 ms. Allocated memory was 154.1 MB in the beginning and 186.6 MB in the end (delta: 32.5 MB). Free memory was 101.8 MB in the beginning and 156.2 MB in the end (delta: -54.4 MB). Peak memory consumption was 72.8 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:05,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 154.1 MB. Free memory was 126.8 MB in the beginning and 126.4 MB in the end (delta: 419.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 459.61 ms. Allocated memory is still 154.1 MB. Free memory was 129.5 MB in the beginning and 120.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.66 ms. Allocated memory is still 154.1 MB. Free memory was 120.1 MB in the beginning and 118.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 538.21 ms. Allocated memory is still 154.1 MB. Free memory was 118.6 MB in the beginning and 102.2 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3102.90 ms. Allocated memory was 154.1 MB in the beginning and 186.6 MB in the end (delta: 32.5 MB). Free memory was 101.8 MB in the beginning and 156.2 MB in the end (delta: -54.4 MB). Peak memory consumption was 72.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 28]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 0 - ProcedureContractResult [Line: 12]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 88 SDslu, 291 SDs, 0 SdLazy, 251 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 9 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 51 LocationsWithAnnotation, 51 PreInvPairs, 79 NumberOfFragments, 452 HoareAnnotationTreeSize, 51 FomulaSimplifications, 34 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 51 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...