/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/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/diamond_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:24:33,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:24:33,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:24:33,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:24:33,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:24:33,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:24:33,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:24:33,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:24:33,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:24:33,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:24:33,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:24:33,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:24:33,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:24:33,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:24:33,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:24:33,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:24:33,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:24:33,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:24:33,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:24:33,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:24:33,597 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:24:33,621 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:24:33,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:24:33,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:24:33,624 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:24:33,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:24:33,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:24:33,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:24:33,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:24:33,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:24:33,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:24:33,625 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:24:33,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:24:33,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:24:33,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:24:33,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:24:33,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:24:33,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:24:33,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:24:33,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:24:33,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:24:33,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:24:33,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:24:33,627 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:24:33,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:24:33,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:24:33,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:24:33,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:24:33,897 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:24:33,898 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:24:33,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/diamond_2-2.c [2021-05-06 11:24:33,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38b950d64/e8f12f035c0a4a84941f3c6135a578bf/FLAGfa9f1fd51 [2021-05-06 11:24:34,316 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:24:34,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/diamond_2-2.c [2021-05-06 11:24:34,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38b950d64/e8f12f035c0a4a84941f3c6135a578bf/FLAGfa9f1fd51 [2021-05-06 11:24:34,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38b950d64/e8f12f035c0a4a84941f3c6135a578bf [2021-05-06 11:24:34,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:24:34,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:24:34,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:24:34,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:24:34,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:24:34,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:24:34" (1/1) ... [2021-05-06 11:24:34,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692687b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34, skipping insertion in model container [2021-05-06 11:24:34,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:24:34" (1/1) ... [2021-05-06 11:24:34,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:24:34,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:24:34,845 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-acceleration/diamond_2-2.c[373,386] [2021-05-06 11:24:34,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:24:34,861 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:24:34,868 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-acceleration/diamond_2-2.c[373,386] [2021-05-06 11:24:34,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:24:34,881 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:24:34,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34 WrapperNode [2021-05-06 11:24:34,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:24:34,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:24:34,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:24:34,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:24:34,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34" (1/1) ... [2021-05-06 11:24:34,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34" (1/1) ... [2021-05-06 11:24:34,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34" (1/1) ... [2021-05-06 11:24:34,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34" (1/1) ... [2021-05-06 11:24:34,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34" (1/1) ... [2021-05-06 11:24:34,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34" (1/1) ... [2021-05-06 11:24:34,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34" (1/1) ... [2021-05-06 11:24:34,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:24:34,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:24:34,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:24:34,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:24:34,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34" (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 [2021-05-06 11:24:34,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:24:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:24:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:24:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:24:34,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:24:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:24:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:24:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:24:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:24:34,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-06 11:24:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:24:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:24:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:24:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:24:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:24:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:24:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:24:34,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:24:35,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:24:35,187 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:24:35,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:24:35 BoogieIcfgContainer [2021-05-06 11:24:35,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:24:35,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:24:35,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:24:35,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:24:35,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:24:34" (1/3) ... [2021-05-06 11:24:35,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315250e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:24:35, skipping insertion in model container [2021-05-06 11:24:35,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:24:34" (2/3) ... [2021-05-06 11:24:35,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315250e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:24:35, skipping insertion in model container [2021-05-06 11:24:35,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:24:35" (3/3) ... [2021-05-06 11:24:35,193 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-2.c [2021-05-06 11:24:35,221 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:24:35,224 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:24:35,234 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:24:35,261 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:24:35,261 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:24:35,261 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:24:35,261 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:24:35,261 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:24:35,261 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:24:35,261 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:24:35,261 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:24:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:24:35,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:24:35,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:35,281 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:35,281 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:35,288 INFO L82 PathProgramCache]: Analyzing trace with hash -154663714, now seen corresponding path program 1 times [2021-05-06 11:24:35,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:35,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115269752] [2021-05-06 11:24:35,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:35,344 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:35,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:35,530 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:35,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115269752] [2021-05-06 11:24:35,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1115269752] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:35,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:35,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:24:35,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807829138] [2021-05-06 11:24:35,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:24:35,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:35,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:24:35,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:24:35,546 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:35,607 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-05-06 11:24:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:24:35,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:24:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:35,612 INFO L225 Difference]: With dead ends: 39 [2021-05-06 11:24:35,612 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 11:24:35,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:24:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 11:24:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 11:24:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2021-05-06 11:24:35,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 11 [2021-05-06 11:24:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:35,645 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2021-05-06 11:24:35,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2021-05-06 11:24:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:24:35,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:35,646 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:24:35,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:24:35,646 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:35,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:35,647 INFO L82 PathProgramCache]: Analyzing trace with hash -213769058, now seen corresponding path program 1 times [2021-05-06 11:24:35,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:35,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903284650] [2021-05-06 11:24:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:35,656 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:24:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:35,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:35,802 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:35,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903284650] [2021-05-06 11:24:35,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [903284650] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:35,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:35,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:24:35,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065760205] [2021-05-06 11:24:35,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:24:35,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:35,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:24:35,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:24:35,805 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:35,886 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2021-05-06 11:24:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:24:35,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:24:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:35,888 INFO L225 Difference]: With dead ends: 29 [2021-05-06 11:24:35,889 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 11:24:35,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:24:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 11:24:35,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-06 11:24:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2021-05-06 11:24:35,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 11 [2021-05-06 11:24:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:35,895 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2021-05-06 11:24:35,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2021-05-06 11:24:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:24:35,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:35,896 INFO L523 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] [2021-05-06 11:24:35,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:24:35,896 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1726513949, now seen corresponding path program 1 times [2021-05-06 11:24:35,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:35,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824888939] [2021-05-06 11:24:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:35,911 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:35,924 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-06 11:24:35,928 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:24:35,930 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:24:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:35,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:36,025 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:36,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824888939] [2021-05-06 11:24:36,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [824888939] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:36,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:36,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:24:36,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287438012] [2021-05-06 11:24:36,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:24:36,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:36,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:24:36,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:24:36,026 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-05-06 11:24:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:36,118 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2021-05-06 11:24:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:24:36,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 22 [2021-05-06 11:24:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:36,119 INFO L225 Difference]: With dead ends: 41 [2021-05-06 11:24:36,119 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 11:24:36,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:24:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 11:24:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 11:24:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 36 transitions. [2021-05-06 11:24:36,124 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 36 transitions. Word has length 22 [2021-05-06 11:24:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:36,124 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 36 transitions. [2021-05-06 11:24:36,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-05-06 11:24:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 36 transitions. [2021-05-06 11:24:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:24:36,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:36,125 INFO L523 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] [2021-05-06 11:24:36,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:24:36,125 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash 715396699, now seen corresponding path program 1 times [2021-05-06 11:24:36,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:36,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27292022] [2021-05-06 11:24:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:36,128 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:36,132 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-06 11:24:36,135 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:24:36,136 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:24:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:36,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:36,198 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:36,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27292022] [2021-05-06 11:24:36,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [27292022] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:36,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:36,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:24:36,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621612617] [2021-05-06 11:24:36,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:24:36,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:36,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:24:36,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:24:36,199 INFO L87 Difference]: Start difference. First operand 25 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-05-06 11:24:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:36,349 INFO L93 Difference]: Finished difference Result 45 states and 70 transitions. [2021-05-06 11:24:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:24:36,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 22 [2021-05-06 11:24:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:36,350 INFO L225 Difference]: With dead ends: 45 [2021-05-06 11:24:36,350 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 11:24:36,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:24:36,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 11:24:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 11:24:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-05-06 11:24:36,356 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 22 [2021-05-06 11:24:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:36,356 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-05-06 11:24:36,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-05-06 11:24:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-05-06 11:24:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:24:36,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:36,357 INFO L523 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] [2021-05-06 11:24:36,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:24:36,357 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:36,358 INFO L82 PathProgramCache]: Analyzing trace with hash 694793691, now seen corresponding path program 1 times [2021-05-06 11:24:36,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:36,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240285617] [2021-05-06 11:24:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:36,361 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:36,365 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-06 11:24:36,368 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:24:36,369 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:24:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:36,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:36,441 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:36,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240285617] [2021-05-06 11:24:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240285617] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:36,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:36,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 11:24:36,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582195286] [2021-05-06 11:24:36,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 11:24:36,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:36,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 11:24:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:24:36,442 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-05-06 11:24:36,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:36,592 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-06 11:24:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 11:24:36,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 22 [2021-05-06 11:24:36,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:36,593 INFO L225 Difference]: With dead ends: 47 [2021-05-06 11:24:36,593 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 11:24:36,594 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 11:24:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 11:24:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 11:24:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-05-06 11:24:36,598 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 22 [2021-05-06 11:24:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:36,598 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-05-06 11:24:36,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-05-06 11:24:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-05-06 11:24:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:24:36,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:36,599 INFO L523 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] [2021-05-06 11:24:36,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:24:36,599 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash 565505435, now seen corresponding path program 1 times [2021-05-06 11:24:36,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:36,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945757316] [2021-05-06 11:24:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:36,602 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:36,606 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-05-06 11:24:36,609 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 0 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:24:36,610 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:24:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:36,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:24:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:24:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:24:36,726 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:24:36,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945757316] [2021-05-06 11:24:36,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1945757316] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:24:36,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:24:36,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:24:36,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629720870] [2021-05-06 11:24:36,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:24:36,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:24:36,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:24:36,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:24:36,728 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-06 11:24:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:24:36,914 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2021-05-06 11:24:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 11:24:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 22 [2021-05-06 11:24:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:24:36,915 INFO L225 Difference]: With dead ends: 49 [2021-05-06 11:24:36,915 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 11:24:36,915 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:24:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 11:24:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 11:24:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:24:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2021-05-06 11:24:36,920 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 22 [2021-05-06 11:24:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:24:36,920 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2021-05-06 11:24:36,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-06 11:24:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2021-05-06 11:24:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 11:24:36,920 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:24:36,920 INFO L523 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] [2021-05-06 11:24:36,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 11:24:36,921 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:24:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:24:36,921 INFO L82 PathProgramCache]: Analyzing trace with hash 622763737, now seen corresponding path program 1 times [2021-05-06 11:24:36,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:24:36,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400256381] [2021-05-06 11:24:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:24:36,931 WARN L240 tifierPushTermWalker]: treesize reduction 13, result has 83.1 percent of original size [2021-05-06 11:24:36,932 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:36,961 WARN L240 tifierPushTermWalker]: treesize reduction 11, result has 78.4 percent of original size [2021-05-06 11:24:36,985 WARN L245 tifierPushTermWalker]: treesize reduction 11, result has 78.4 percent of original size 40 [2021-05-06 11:24:36,986 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-06 11:24:36,992 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:36,995 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:37,007 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 40 [2021-05-06 11:24:37,008 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-05-06 11:24:37,014 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:24:37,043 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-05-06 11:24:37,058 WARN L245 tifierPushTermWalker]: treesize reduction 13, result has 83.1 percent of original size 64 [2021-05-06 11:24:37,145 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2021-05-06 11:24:37,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:24:37,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:24:37,160 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:24:37,165 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (<= (+ (* 5 .aux_div_v_it_5_58.0) (* 4294967290 main_~x~0_5) (* (- 4294967291) .aux_div_aux_mod_v_it_5_58_93.1) 4294967296) 0) [2021-05-06 11:24:37,165 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (not (<= (+ main_~x~0_5 (- .aux_div_v_it_5_58.0) (- .aux_div_aux_mod_v_it_5_58_93.1) 1) 0)) [2021-05-06 11:24:37,166 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (not (<= (+ (* 5 .aux_div_v_it_5_58.0) (* 4294967290 main_~x~0_5) (* (- 4294967291) .aux_div_aux_mod_v_it_5_58_93.1) 99) 0)) [2021-05-06 11:24:37,166 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (not (<= (let ((.cse0 (- main_~x~0_5))) (+ .aux_div_v_it_5_58.0 .aux_div_aux_mod_v_it_5_58_93.1 .cse0 (- (div (+ .cse0 main_~x~0_6) (- 5))) 1)) 0)) [2021-05-06 11:24:37,167 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (<= (+ (* 5 .aux_div_v_it_5_58.2) (* 4294967290 main_~x~0_5) (* (- 4294967291) .aux_div_aux_mod_v_it_5_58_93.3) 4294967296) 0) [2021-05-06 11:24:37,167 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (not (<= (+ main_~x~0_5 (- .aux_div_v_it_5_58.2) (- .aux_div_aux_mod_v_it_5_58_93.3) 1) 0)) [2021-05-06 11:24:37,168 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (not (<= (+ (* 5 .aux_div_v_it_5_58.2) (* 4294967290 main_~x~0_5) (* (- 4294967291) .aux_div_aux_mod_v_it_5_58_93.3) 99) 0)) [2021-05-06 11:24:37,168 WARN L250 erpolLogProxyWrapper]: Quant: Clause contains literal that is not almost uninterpreted: (not (<= (let ((.cse0 (- main_~x~0_5))) (+ .aux_div_v_it_5_58.2 .aux_div_aux_mod_v_it_5_58_93.3 .cse0 (- (div (+ .cse0 main_~x~0_6) (- 5))) 1)) 0)) [2021-05-06 11:24:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-05-06 11:24:37,184 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-06 11:24:37,184 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 11:24:37,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-06 11:24:37,194 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-06 11:24:37,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:24:37 BoogieIcfgContainer [2021-05-06 11:24:37,194 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:24:37,195 INFO L168 Benchmark]: Toolchain (without parser) took 2449.47 ms. Allocated memory was 189.8 MB in the beginning and 228.6 MB in the end (delta: 38.8 MB). Free memory was 155.6 MB in the beginning and 127.7 MB in the end (delta: 27.9 MB). Peak memory consumption was 67.5 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:37,195 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 189.8 MB. Free memory was 172.2 MB in the beginning and 172.1 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:24:37,195 INFO L168 Benchmark]: CACSL2BoogieTranslator took 135.60 ms. Allocated memory is still 189.8 MB. Free memory was 155.5 MB in the beginning and 145.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:37,196 INFO L168 Benchmark]: Boogie Preprocessor took 57.92 ms. Allocated memory is still 189.8 MB. Free memory was 145.4 MB in the beginning and 172.7 MB in the end (delta: -27.3 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:37,196 INFO L168 Benchmark]: RCFGBuilder took 247.47 ms. Allocated memory is still 189.8 MB. Free memory was 172.7 MB in the beginning and 155.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:37,196 INFO L168 Benchmark]: TraceAbstraction took 2005.12 ms. Allocated memory was 189.8 MB in the beginning and 228.6 MB in the end (delta: 38.8 MB). Free memory was 155.9 MB in the beginning and 127.7 MB in the end (delta: 28.2 MB). Peak memory consumption was 68.1 MB. Max. memory is 8.0 GB. [2021-05-06 11:24:37,197 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 189.8 MB. Free memory was 172.2 MB in the beginning and 172.1 MB in the end (delta: 93.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 135.60 ms. Allocated memory is still 189.8 MB. Free memory was 155.5 MB in the beginning and 145.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.92 ms. Allocated memory is still 189.8 MB. Free memory was 145.4 MB in the beginning and 172.7 MB in the end (delta: -27.3 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 247.47 ms. Allocated memory is still 189.8 MB. Free memory was 172.7 MB in the beginning and 155.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2005.12 ms. Allocated memory was 189.8 MB in the beginning and 228.6 MB in the end (delta: 38.8 MB). Free memory was 155.9 MB in the beginning and 127.7 MB in the end (delta: 28.2 MB). Peak memory consumption was 68.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L19] x++ [L21] COND FALSE !(y % 2 == 0) [L22] x -= 2 [L24] COND FALSE !(y % 2 == 0) [L25] x += 2 [L27] COND FALSE !(y % 2 == 0) [L28] x -= 2 [L30] COND FALSE !(y % 2 == 0) [L31] x += 2 [L33] COND FALSE !(y % 2 == 0) [L34] x -= 4 [L36] COND FALSE !(y % 2 == 0) [L37] x += 4 [L39] COND FALSE !(y % 2 == 0) [L40] x += 2 [L42] COND FALSE !(y % 2 == 0) [L43] x -= 4 [L45] COND FALSE !(y % 2 == 0) [L46] x -= 4 [L17] COND FALSE !(x < 99) [L49] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1928.0ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 15.7ms, AutomataDifference: 748.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 154 SDtfs, 165 SDslu, 88 SDs, 0 SdLazy, 451 SolverSat, 53 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 288.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 548.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...