/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/eq1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:50:02,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:50:02,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:50:02,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:50:02,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:50:02,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:50:02,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:50:02,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:50:02,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:50:02,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:50:02,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:50:02,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:50:02,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:50:02,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:50:02,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:50:02,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:50:02,457 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:50:02,458 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:50:02,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:50:02,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:50:02,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:50:02,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:50:02,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:50:02,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:50:02,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-07 06:50:02,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-07 06:50:02,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-07 06:50:02,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-07 06:50:02,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-07 06:50:02,510 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-07 06:50:02,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 06:50:02,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 06:50:02,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 06:50:02,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 06:50:02,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 06:50:02,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 06:50:02,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 06:50:02,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 06:50:02,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:50:02,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:50:02,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:50:02,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:50:02,545 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:50:02,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:50:02,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:50:02,551 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:50:02,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:50:02,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:50:02,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:50:02,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:50:02,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:50:02,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:50:02,554 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:50:02,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:50:02,554 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:50:02,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:50:02,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:50:02,555 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:50:02,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:50:02,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:50:02,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:50:02,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:50:02,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:50:02,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:50:02,557 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:50:03,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:50:03,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:50:03,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:50:03,064 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:50:03,064 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:50:03,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/eq1.c [2020-11-07 06:50:03,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da26da1ab/78c120274bd94354bc154a867061f6c1/FLAG2869ff204 [2020-11-07 06:50:03,905 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:50:03,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/eq1.c [2020-11-07 06:50:03,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da26da1ab/78c120274bd94354bc154a867061f6c1/FLAG2869ff204 [2020-11-07 06:50:04,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da26da1ab/78c120274bd94354bc154a867061f6c1 [2020-11-07 06:50:04,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:50:04,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:50:04,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:50:04,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:50:04,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:50:04,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:50:04" (1/1) ... [2020-11-07 06:50:04,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e09e050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04, skipping insertion in model container [2020-11-07 06:50:04,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:50:04" (1/1) ... [2020-11-07 06:50:04,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:50:04,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:50:04,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:50:04,631 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:50:04,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:50:04,678 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:50:04,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04 WrapperNode [2020-11-07 06:50:04,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:50:04,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:50:04,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:50:04,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:50:04,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04" (1/1) ... [2020-11-07 06:50:04,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04" (1/1) ... [2020-11-07 06:50:04,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04" (1/1) ... [2020-11-07 06:50:04,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04" (1/1) ... [2020-11-07 06:50:04,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04" (1/1) ... [2020-11-07 06:50:04,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04" (1/1) ... [2020-11-07 06:50:04,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04" (1/1) ... [2020-11-07 06:50:04,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:50:04,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:50:04,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:50:04,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:50:04,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:50:04,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:50:04,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:50:04,815 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:50:04,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:50:04,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:50:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:50:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:50:04,816 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:50:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:50:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 06:50:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:50:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:50:04,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:50:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:50:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:50:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:50:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:50:04,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:50:05,286 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:50:05,286 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 06:50:05,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:50:05 BoogieIcfgContainer [2020-11-07 06:50:05,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:50:05,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:50:05,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:50:05,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:50:05,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:50:04" (1/3) ... [2020-11-07 06:50:05,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5ecee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:50:05, skipping insertion in model container [2020-11-07 06:50:05,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:50:04" (2/3) ... [2020-11-07 06:50:05,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e5ecee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:50:05, skipping insertion in model container [2020-11-07 06:50:05,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:50:05" (3/3) ... [2020-11-07 06:50:05,299 INFO L111 eAbstractionObserver]: Analyzing ICFG eq1.c [2020-11-07 06:50:05,318 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:50:05,322 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:50:05,337 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:50:05,365 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:50:05,366 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:50:05,366 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:50:05,366 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:50:05,366 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:50:05,366 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:50:05,366 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:50:05,367 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:50:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2020-11-07 06:50:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-07 06:50:05,397 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:05,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:50:05,399 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:05,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1433783201, now seen corresponding path program 1 times [2020-11-07 06:50:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:05,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683971729] [2020-11-07 06:50:05,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:05,757 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-11-07 06:50:05,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:05,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683971729] [2020-11-07 06:50:05,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:50:05,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 06:50:05,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756299823] [2020-11-07 06:50:05,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 06:50:05,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:05,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 06:50:05,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:50:05,860 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 3 states. [2020-11-07 06:50:06,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:06,021 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-11-07 06:50:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 06:50:06,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-11-07 06:50:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:06,034 INFO L225 Difference]: With dead ends: 71 [2020-11-07 06:50:06,034 INFO L226 Difference]: Without dead ends: 48 [2020-11-07 06:50:06,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 06:50:06,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-07 06:50:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-07 06:50:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-07 06:50:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-07 06:50:06,104 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 30 [2020-11-07 06:50:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:06,105 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-07 06:50:06,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 06:50:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-07 06:50:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-07 06:50:06,107 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:06,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:50:06,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:50:06,108 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1781714449, now seen corresponding path program 1 times [2020-11-07 06:50:06,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:06,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072164916] [2020-11-07 06:50:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:06,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:06,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072164916] [2020-11-07 06:50:06,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:50:06,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 06:50:06,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113404431] [2020-11-07 06:50:06,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:50:06,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:06,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:50:06,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:50:06,485 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 7 states. [2020-11-07 06:50:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:06,860 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-11-07 06:50:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 06:50:06,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-11-07 06:50:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:06,864 INFO L225 Difference]: With dead ends: 79 [2020-11-07 06:50:06,864 INFO L226 Difference]: Without dead ends: 72 [2020-11-07 06:50:06,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:50:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-07 06:50:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2020-11-07 06:50:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-07 06:50:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-11-07 06:50:06,884 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 31 [2020-11-07 06:50:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:06,884 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-11-07 06:50:06,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:50:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-11-07 06:50:06,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 06:50:06,886 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:06,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:50:06,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:50:06,887 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:06,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:06,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1781189194, now seen corresponding path program 1 times [2020-11-07 06:50:06,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:06,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890828337] [2020-11-07 06:50:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:07,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:07,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890828337] [2020-11-07 06:50:07,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:50:07,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:50:07,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261530722] [2020-11-07 06:50:07,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:50:07,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:07,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:50:07,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:50:07,312 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 9 states. [2020-11-07 06:50:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:07,812 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-11-07 06:50:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 06:50:07,813 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-11-07 06:50:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:07,815 INFO L225 Difference]: With dead ends: 84 [2020-11-07 06:50:07,815 INFO L226 Difference]: Without dead ends: 77 [2020-11-07 06:50:07,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:50:07,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-07 06:50:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-11-07 06:50:07,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-07 06:50:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-11-07 06:50:07,835 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 41 [2020-11-07 06:50:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:07,835 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-11-07 06:50:07,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:50:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-11-07 06:50:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-07 06:50:07,840 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:07,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:50:07,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:50:07,841 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:07,843 INFO L82 PathProgramCache]: Analyzing trace with hash -612801078, now seen corresponding path program 1 times [2020-11-07 06:50:07,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:07,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019181450] [2020-11-07 06:50:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:08,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:08,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019181450] [2020-11-07 06:50:08,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:50:08,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:50:08,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227920496] [2020-11-07 06:50:08,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:50:08,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:08,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:50:08,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:50:08,195 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 9 states. [2020-11-07 06:50:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:08,618 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-11-07 06:50:08,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 06:50:08,619 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-11-07 06:50:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:08,620 INFO L225 Difference]: With dead ends: 84 [2020-11-07 06:50:08,621 INFO L226 Difference]: Without dead ends: 77 [2020-11-07 06:50:08,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-07 06:50:08,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-07 06:50:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-11-07 06:50:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-07 06:50:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-11-07 06:50:08,641 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 41 [2020-11-07 06:50:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:08,641 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-11-07 06:50:08,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:50:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-11-07 06:50:08,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-07 06:50:08,643 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:50:08,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:50:08,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:50:08,644 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:50:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:50:08,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1459914853, now seen corresponding path program 1 times [2020-11-07 06:50:08,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:50:08,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510909163] [2020-11-07 06:50:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:50:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:09,138 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2020-11-07 06:50:09,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:50:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:50:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:50:09,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510909163] [2020-11-07 06:50:09,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:50:09,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-07 06:50:09,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685660499] [2020-11-07 06:50:09,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 06:50:09,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:50:09,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 06:50:09,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:50:09,248 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 11 states. [2020-11-07 06:50:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:50:09,837 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-11-07 06:50:09,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:50:09,838 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-11-07 06:50:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:50:09,839 INFO L225 Difference]: With dead ends: 71 [2020-11-07 06:50:09,839 INFO L226 Difference]: Without dead ends: 0 [2020-11-07 06:50:09,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:50:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-07 06:50:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-07 06:50:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-07 06:50:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-07 06:50:09,841 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-11-07 06:50:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:50:09,842 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-07 06:50:09,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 06:50:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-07 06:50:09,842 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-07 06:50:09,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:50:09,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-07 06:50:10,798 INFO L269 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,798 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,799 INFO L269 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,799 INFO L269 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,799 INFO L269 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,799 INFO L269 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,800 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:50:10,800 INFO L269 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,800 INFO L269 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-11-07 06:50:10,800 INFO L269 CegarLoopResult]: At program point L3-5(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,800 INFO L269 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,801 INFO L269 CegarLoopResult]: At program point L3-6(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,801 INFO L269 CegarLoopResult]: At program point L3-7(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,801 INFO L269 CegarLoopResult]: At program point L3-8(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,801 INFO L269 CegarLoopResult]: At program point L3-9(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,801 INFO L269 CegarLoopResult]: At program point L3-10(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,802 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-07 06:50:10,802 INFO L269 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,802 INFO L269 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-11-07 06:50:10,802 INFO L269 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:50:10,802 INFO L269 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-11-07 06:50:10,803 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-07 06:50:10,803 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-07 06:50:10,803 INFO L269 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-11-07 06:50:10,803 INFO L269 CegarLoopResult]: At program point mainEXIT(lines 11 25) the Hoare annotation is: true [2020-11-07 06:50:10,803 INFO L269 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-11-07 06:50:10,803 INFO L262 CegarLoopResult]: At program point L17(lines 17 21) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,804 INFO L262 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,804 INFO L262 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (= main_~x~0 main_~w~0) [2020-11-07 06:50:10,804 INFO L262 CegarLoopResult]: At program point L17-3(line 17) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,804 INFO L269 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-11-07 06:50:10,804 INFO L262 CegarLoopResult]: At program point L17-4(lines 16 22) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,804 INFO L269 CegarLoopResult]: At program point mainFINAL(lines 11 25) the Hoare annotation is: true [2020-11-07 06:50:10,805 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 11 25) the Hoare annotation is: true [2020-11-07 06:50:10,805 INFO L262 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,805 INFO L262 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,805 INFO L262 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,805 INFO L262 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2020-11-07 06:50:10,805 INFO L262 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,806 INFO L262 CegarLoopResult]: At program point L20-3(line 20) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2020-11-07 06:50:10,806 INFO L262 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2020-11-07 06:50:10,806 INFO L262 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (let ((.cse0 (+ main_~y~0 1))) (and (= main_~x~0 main_~w~0) (<= .cse0 main_~z~0) (<= main_~z~0 .cse0))) [2020-11-07 06:50:10,806 INFO L262 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,806 INFO L262 CegarLoopResult]: At program point L18-3(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2020-11-07 06:50:10,807 INFO L262 CegarLoopResult]: At program point L20-5(line 20) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,807 INFO L262 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= main_~x~0 main_~w~0) [2020-11-07 06:50:10,807 INFO L262 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 1))) (and (<= main_~w~0 .cse0) (<= .cse0 main_~w~0) (= main_~z~0 main_~y~0))) [2020-11-07 06:50:10,807 INFO L262 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: (= main_~x~0 main_~w~0) [2020-11-07 06:50:10,807 INFO L262 CegarLoopResult]: At program point L16-3(line 16) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,807 INFO L262 CegarLoopResult]: At program point L18-5(line 18) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,808 INFO L269 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-11-07 06:50:10,808 INFO L262 CegarLoopResult]: At program point L16-4(lines 16 22) the Hoare annotation is: (and (= main_~x~0 main_~w~0) (= main_~z~0 main_~y~0)) [2020-11-07 06:50:10,808 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-11-07 06:50:10,808 INFO L269 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2020-11-07 06:50:10,808 INFO L262 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:50:10,808 INFO L262 CegarLoopResult]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-11-07 06:50:10,808 INFO L262 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-11-07 06:50:10,809 INFO L269 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2020-11-07 06:50:10,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 06:50:10 BoogieIcfgContainer [2020-11-07 06:50:10,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 06:50:10,831 INFO L168 Benchmark]: Toolchain (without parser) took 6555.07 ms. Allocated memory was 160.4 MB in the beginning and 219.2 MB in the end (delta: 58.7 MB). Free memory was 137.7 MB in the beginning and 104.9 MB in the end (delta: 32.8 MB). Peak memory consumption was 122.2 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:10,832 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 160.4 MB. Free memory was 134.9 MB in the beginning and 134.8 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 06:50:10,833 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.82 ms. Allocated memory is still 160.4 MB. Free memory was 137.0 MB in the beginning and 127.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:10,834 INFO L168 Benchmark]: Boogie Preprocessor took 45.66 ms. Allocated memory is still 160.4 MB. Free memory was 127.7 MB in the beginning and 126.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:10,835 INFO L168 Benchmark]: RCFGBuilder took 561.35 ms. Allocated memory is still 160.4 MB. Free memory was 126.1 MB in the beginning and 141.0 MB in the end (delta: -14.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:10,836 INFO L168 Benchmark]: TraceAbstraction took 5538.50 ms. Allocated memory was 160.4 MB in the beginning and 219.2 MB in the end (delta: 58.7 MB). Free memory was 140.6 MB in the beginning and 104.9 MB in the end (delta: 35.7 MB). Peak memory consumption was 124.9 MB. Max. memory is 8.0 GB. [2020-11-07 06:50:10,840 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 160.4 MB. Free memory was 134.9 MB in the beginning and 134.8 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 392.82 ms. Allocated memory is still 160.4 MB. Free memory was 137.0 MB in the beginning and 127.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.66 ms. Allocated memory is still 160.4 MB. Free memory was 127.7 MB in the beginning and 126.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 561.35 ms. Allocated memory is still 160.4 MB. Free memory was 126.1 MB in the beginning and 141.0 MB in the end (delta: -14.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5538.50 ms. Allocated memory was 160.4 MB in the beginning and 219.2 MB in the end (delta: 58.7 MB). Free memory was 140.6 MB in the beginning and 104.9 MB in the end (delta: 35.7 MB). Peak memory consumption was 124.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: x == w && z == y - ProcedureContractResult [Line: 3]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 58 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 220 SDtfs, 317 SDslu, 425 SDs, 0 SdLazy, 644 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 48 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 58 LocationsWithAnnotation, 98 PreInvPairs, 126 NumberOfFragments, 261 HoareAnnotationTreeSize, 98 FomulaSimplifications, 6932 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 58 FomulaSimplificationsInter, 984 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 72471 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/7 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...