/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/ludcmp.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 06:40:01,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 06:40:01,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 06:40:01,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 06:40:01,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 06:40:01,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 06:40:01,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 06:40:01,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 06:40:01,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 06:40:01,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 06:40:01,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 06:40:01,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 06:40:01,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 06:40:01,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 06:40:01,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 06:40:01,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 06:40:01,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 06:40:01,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 06:40:01,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 06:40:01,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 06:40:01,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 06:40:01,492 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 06:40:01,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 06:40:01,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 06:40:01,493 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 06:40:01,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 06:40:01,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 06:40:01,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 06:40:01,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 06:40:01,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 06:40:01,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 06:40:01,494 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 06:40:01,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 06:40:01,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 06:40:01,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 06:40:01,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 06:40:01,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 06:40:01,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 06:40:01,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 06:40:01,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 06:40:01,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 06:40:01,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 06:40:01,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 06:40:01,496 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 06:40:01,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 06:40:01,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 06:40:01,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 06:40:01,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 06:40:01,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 06:40:01,804 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 06:40:01,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/ludcmp.c [2021-05-01 06:40:01,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f586ae7fa/88adaead3fae4dd6b9b7f9fd4ecad647/FLAG6765e21c4 [2021-05-01 06:40:02,310 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 06:40:02,311 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c [2021-05-01 06:40:02,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f586ae7fa/88adaead3fae4dd6b9b7f9fd4ecad647/FLAG6765e21c4 [2021-05-01 06:40:02,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f586ae7fa/88adaead3fae4dd6b9b7f9fd4ecad647 [2021-05-01 06:40:02,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 06:40:02,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 06:40:02,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 06:40:02,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 06:40:02,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 06:40:02,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:40:02" (1/1) ... [2021-05-01 06:40:02,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b50bb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02, skipping insertion in model container [2021-05-01 06:40:02,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 06:40:02" (1/1) ... [2021-05-01 06:40:02,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 06:40:02,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 06:40:02,474 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c[318,331] [2021-05-01 06:40:02,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:40:02,593 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 06:40:02,604 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/ludcmp.c[318,331] [2021-05-01 06:40:02,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 06:40:02,661 INFO L208 MainTranslator]: Completed translation [2021-05-01 06:40:02,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02 WrapperNode [2021-05-01 06:40:02,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 06:40:02,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 06:40:02,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 06:40:02,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 06:40:02,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02" (1/1) ... [2021-05-01 06:40:02,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02" (1/1) ... [2021-05-01 06:40:02,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02" (1/1) ... [2021-05-01 06:40:02,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02" (1/1) ... [2021-05-01 06:40:02,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02" (1/1) ... [2021-05-01 06:40:02,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02" (1/1) ... [2021-05-01 06:40:02,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02" (1/1) ... [2021-05-01 06:40:02,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 06:40:02,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 06:40:02,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 06:40:02,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 06:40:02,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02" (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 [2021-05-01 06:40:02,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 06:40:02,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 06:40:02,838 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 06:40:02,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 06:40:02,838 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2021-05-01 06:40:02,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 06:40:02,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2021-05-01 06:40:02,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 06:40:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 06:40:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 06:40:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 06:40:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 06:40:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2021-05-01 06:40:02,839 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2021-05-01 06:40:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 06:40:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-05-01 06:40:02,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-05-01 06:40:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 06:40:02,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 06:40:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 06:40:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 06:40:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 06:40:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 06:40:03,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 06:40:03,283 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-05-01 06:40:03,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:40:03 BoogieIcfgContainer [2021-05-01 06:40:03,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 06:40:03,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 06:40:03,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 06:40:03,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 06:40:03,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 06:40:02" (1/3) ... [2021-05-01 06:40:03,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32701b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:40:03, skipping insertion in model container [2021-05-01 06:40:03,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 06:40:02" (2/3) ... [2021-05-01 06:40:03,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32701b64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 06:40:03, skipping insertion in model container [2021-05-01 06:40:03,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 06:40:03" (3/3) ... [2021-05-01 06:40:03,292 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2021-05-01 06:40:03,297 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 06:40:03,302 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 06:40:03,316 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 06:40:03,332 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 06:40:03,332 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 06:40:03,332 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 06:40:03,332 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 06:40:03,332 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 06:40:03,332 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 06:40:03,332 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 06:40:03,332 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 06:40:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-01 06:40:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 06:40:03,361 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:03,361 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:03,362 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1448102218, now seen corresponding path program 1 times [2021-05-01 06:40:03,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:03,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877595392] [2021-05-01 06:40:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:03,431 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:03,551 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:03,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:03,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:03,708 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:03,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877595392] [2021-05-01 06:40:03,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [877595392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:03,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:03,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 06:40:03,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823303282] [2021-05-01 06:40:03,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 06:40:03,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:03,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 06:40:03,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 06:40:03,725 INFO L87 Difference]: Start difference. First operand has 64 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 53 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 06:40:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:04,015 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2021-05-01 06:40:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 06:40:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-01 06:40:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:04,022 INFO L225 Difference]: With dead ends: 127 [2021-05-01 06:40:04,022 INFO L226 Difference]: Without dead ends: 24 [2021-05-01 06:40:04,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 06:40:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-01 06:40:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-05-01 06:40:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-05-01 06:40:04,077 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-05-01 06:40:04,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:04,077 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-05-01 06:40:04,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 06:40:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-05-01 06:40:04,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 06:40:04,078 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:04,078 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:04,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 06:40:04,079 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:04,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1436096445, now seen corresponding path program 1 times [2021-05-01 06:40:04,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:04,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663795716] [2021-05-01 06:40:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:04,084 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,134 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:04,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,146 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,226 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:04,228 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663795716] [2021-05-01 06:40:04,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [663795716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:04,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:04,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-01 06:40:04,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696880737] [2021-05-01 06:40:04,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-01 06:40:04,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:04,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-01 06:40:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-01 06:40:04,230 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 06:40:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:04,450 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-05-01 06:40:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 06:40:04,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-01 06:40:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:04,451 INFO L225 Difference]: With dead ends: 40 [2021-05-01 06:40:04,451 INFO L226 Difference]: Without dead ends: 26 [2021-05-01 06:40:04,452 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-01 06:40:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-01 06:40:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-05-01 06:40:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-01 06:40:04,458 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2021-05-01 06:40:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:04,458 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-01 06:40:04,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 06:40:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-01 06:40:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-01 06:40:04,459 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:04,459 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:04,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 06:40:04,459 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1858105272, now seen corresponding path program 1 times [2021-05-01 06:40:04,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:04,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954762789] [2021-05-01 06:40:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:04,474 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-01 06:40:04,476 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,508 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,509 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,510 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,515 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,515 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:04,523 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,524 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:04,530 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,530 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:04,598 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:04,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954762789] [2021-05-01 06:40:04,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [954762789] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:04,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:04,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 06:40:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910341339] [2021-05-01 06:40:04,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 06:40:04,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 06:40:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-01 06:40:04,600 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-05-01 06:40:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:04,811 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-05-01 06:40:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 06:40:04,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 16 [2021-05-01 06:40:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:04,813 INFO L225 Difference]: With dead ends: 45 [2021-05-01 06:40:04,813 INFO L226 Difference]: Without dead ends: 30 [2021-05-01 06:40:04,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-01 06:40:04,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-01 06:40:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2021-05-01 06:40:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-01 06:40:04,819 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-05-01 06:40:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:04,820 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-01 06:40:04,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-05-01 06:40:04,820 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-01 06:40:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-01 06:40:04,820 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:04,821 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:04,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 06:40:04,821 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:04,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1949651507, now seen corresponding path program 2 times [2021-05-01 06:40:04,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:04,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539096542] [2021-05-01 06:40:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:04,833 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-01 06:40:04,834 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,860 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,860 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:04,865 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,865 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:04,873 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,874 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:04,884 INFO L142 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-05-01 06:40:04,884 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:04,944 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:04,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:04,945 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:04,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539096542] [2021-05-01 06:40:04,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1539096542] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:04,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:04,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 06:40:04,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237498885] [2021-05-01 06:40:04,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 06:40:04,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:04,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 06:40:04,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-01 06:40:04,947 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-05-01 06:40:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:05,153 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-01 06:40:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 06:40:05,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 20 [2021-05-01 06:40:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:05,155 INFO L225 Difference]: With dead ends: 57 [2021-05-01 06:40:05,155 INFO L226 Difference]: Without dead ends: 38 [2021-05-01 06:40:05,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:40:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-01 06:40:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-05-01 06:40:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-01 06:40:05,163 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-01 06:40:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:05,163 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-01 06:40:05,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-05-01 06:40:05,163 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-01 06:40:05,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-01 06:40:05,163 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:05,164 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:05,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 06:40:05,164 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:05,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:05,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1140304881, now seen corresponding path program 1 times [2021-05-01 06:40:05,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:05,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403006032] [2021-05-01 06:40:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:05,178 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-01 06:40:05,179 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:05,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,204 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:05,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:05,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:05,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,226 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:05,234 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:05,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:05,303 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:05,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403006032] [2021-05-01 06:40:05,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403006032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:05,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:05,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 06:40:05,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659113064] [2021-05-01 06:40:05,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 06:40:05,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:05,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 06:40:05,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-01 06:40:05,305 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-05-01 06:40:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:05,557 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2021-05-01 06:40:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 06:40:05,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 20 [2021-05-01 06:40:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:05,558 INFO L225 Difference]: With dead ends: 68 [2021-05-01 06:40:05,558 INFO L226 Difference]: Without dead ends: 49 [2021-05-01 06:40:05,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-01 06:40:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-01 06:40:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-05-01 06:40:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-05-01 06:40:05,566 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 20 [2021-05-01 06:40:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:05,566 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-05-01 06:40:05,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-05-01 06:40:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-05-01 06:40:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-01 06:40:05,567 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:05,567 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:05,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-01 06:40:05,567 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash -162258006, now seen corresponding path program 2 times [2021-05-01 06:40:05,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:05,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250221752] [2021-05-01 06:40:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:05,580 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-01 06:40:05,582 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:05,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:05,609 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:05,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:05,620 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:05,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:05,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:05,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:05,676 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:05,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250221752] [2021-05-01 06:40:05,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250221752] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:05,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:05,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 06:40:05,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118596069] [2021-05-01 06:40:05,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 06:40:05,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:05,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 06:40:05,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-01 06:40:05,678 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-05-01 06:40:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:05,873 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-05-01 06:40:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 06:40:05,873 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 24 [2021-05-01 06:40:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:05,875 INFO L225 Difference]: With dead ends: 80 [2021-05-01 06:40:05,875 INFO L226 Difference]: Without dead ends: 57 [2021-05-01 06:40:05,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-01 06:40:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-01 06:40:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-05-01 06:40:05,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-05-01 06:40:05,889 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2021-05-01 06:40:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:05,889 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-05-01 06:40:05,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-05-01 06:40:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-05-01 06:40:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-01 06:40:05,890 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:05,890 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:05,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-01 06:40:05,890 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1312024861, now seen corresponding path program 3 times [2021-05-01 06:40:05,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:05,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275974315] [2021-05-01 06:40:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:05,904 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-01 06:40:05,906 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:05,952 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,952 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:05,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:05,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:05,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:05,967 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:05,973 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,974 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:05,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:05,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:05,986 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:06,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:06,030 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:06,031 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:06,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275974315] [2021-05-01 06:40:06,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1275974315] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:06,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:06,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-01 06:40:06,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827595050] [2021-05-01 06:40:06,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-01 06:40:06,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:06,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-01 06:40:06,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-01 06:40:06,034 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-05-01 06:40:06,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:06,214 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2021-05-01 06:40:06,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-01 06:40:06,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 28 [2021-05-01 06:40:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:06,215 INFO L225 Difference]: With dead ends: 92 [2021-05-01 06:40:06,215 INFO L226 Difference]: Without dead ends: 65 [2021-05-01 06:40:06,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-05-01 06:40:06,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-01 06:40:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-05-01 06:40:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-05-01 06:40:06,222 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 28 [2021-05-01 06:40:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:06,222 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-05-01 06:40:06,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-05-01 06:40:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-05-01 06:40:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-01 06:40:06,223 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:06,223 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:06,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-01 06:40:06,223 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:06,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:06,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1026934172, now seen corresponding path program 4 times [2021-05-01 06:40:06,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:06,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157901803] [2021-05-01 06:40:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:06,232 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-01 06:40:06,233 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:06,252 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:06,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,253 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:06,256 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 06:40:06,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:06,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:06,271 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:06,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 06:40:06,284 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 06:40:06,292 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:06,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 06:40:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 06:40:06,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 06:40:06,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 06:40:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 06:40:06,333 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 06:40:06,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157901803] [2021-05-01 06:40:06,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [157901803] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 06:40:06,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 06:40:06,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-01 06:40:06,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353134045] [2021-05-01 06:40:06,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-01 06:40:06,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 06:40:06,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-01 06:40:06,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-01 06:40:06,334 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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) [2021-05-01 06:40:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 06:40:06,513 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2021-05-01 06:40:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-01 06:40:06,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 32 [2021-05-01 06:40:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 06:40:06,514 INFO L225 Difference]: With dead ends: 98 [2021-05-01 06:40:06,514 INFO L226 Difference]: Without dead ends: 67 [2021-05-01 06:40:06,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-05-01 06:40:06,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-01 06:40:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-01 06:40:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 06:40:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-05-01 06:40:06,522 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 32 [2021-05-01 06:40:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 06:40:06,522 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-05-01 06:40:06,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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) [2021-05-01 06:40:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-05-01 06:40:06,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-01 06:40:06,523 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 06:40:06,523 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 06:40:06,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-01 06:40:06,523 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 06:40:06,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 06:40:06,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1975029803, now seen corresponding path program 5 times [2021-05-01 06:40:06,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 06:40:06,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62993085] [2021-05-01 06:40:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 06:40:06,534 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2021-05-01 06:40:06,535 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 06:40:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 06:40:06,548 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 06:40:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 06:40:06,559 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 06:40:06,577 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-01 06:40:06,578 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 06:40:06,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-01 06:40:06,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 06:40:06 BoogieIcfgContainer [2021-05-01 06:40:06,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 06:40:06,590 INFO L168 Benchmark]: Toolchain (without parser) took 4252.54 ms. Allocated memory was 188.7 MB in the beginning and 238.0 MB in the end (delta: 49.3 MB). Free memory was 153.1 MB in the beginning and 172.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 30.8 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:06,591 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 188.7 MB. Free memory is still 169.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 06:40:06,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.70 ms. Allocated memory is still 188.7 MB. Free memory was 152.8 MB in the beginning and 169.5 MB in the end (delta: -16.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:06,591 INFO L168 Benchmark]: Boogie Preprocessor took 75.30 ms. Allocated memory is still 188.7 MB. Free memory was 169.5 MB in the beginning and 166.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:06,592 INFO L168 Benchmark]: RCFGBuilder took 545.89 ms. Allocated memory is still 188.7 MB. Free memory was 166.9 MB in the beginning and 138.0 MB in the end (delta: 28.8 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:06,592 INFO L168 Benchmark]: TraceAbstraction took 3303.51 ms. Allocated memory was 188.7 MB in the beginning and 238.0 MB in the end (delta: 49.3 MB). Free memory was 137.5 MB in the beginning and 172.0 MB in the end (delta: -34.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. [2021-05-01 06:40:06,593 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 188.7 MB. Free memory is still 169.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 322.70 ms. Allocated memory is still 188.7 MB. Free memory was 152.8 MB in the beginning and 169.5 MB in the end (delta: -16.7 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.30 ms. Allocated memory is still 188.7 MB. Free memory was 169.5 MB in the beginning and 166.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 545.89 ms. Allocated memory is still 188.7 MB. Free memory was 166.9 MB in the beginning and 138.0 MB in the end (delta: 28.8 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3303.51 ms. Allocated memory was 188.7 MB in the beginning and 238.0 MB in the end (delta: 49.3 MB). Free memory was 137.5 MB in the beginning and 172.0 MB in the end (delta: -34.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) [L99] COND FALSE !(i == j) [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ [L96] COND FALSE !(j <= n) [L102] CALL __VERIFIER_assert(i==2) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 67 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3248.4ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 22.2ms, AutomataDifference: 1775.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 181 SDtfs, 287 SDslu, 181 SDs, 0 SdLazy, 479 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 581.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1427.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=8, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 74.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 35 StatesRemovedByMinimization, 7 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...