/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-lit/hhk2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 00:21:25,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 00:21:25,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 00:21:25,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 00:21:25,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 00:21:25,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 00:21:25,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 00:21:25,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 00:21:25,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 00:21:25,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 00:21:25,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 00:21:25,519 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 00:21:25,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 00:21:25,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 00:21:25,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 00:21:25,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 00:21:25,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 00:21:25,569 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-24 00:21:25,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 00:21:25,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 00:21:25,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 00:21:25,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 00:21:25,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 00:21:25,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 00:21:25,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 00:21:25,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 00:21:25,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 00:21:25,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 00:21:25,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 00:21:25,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 00:21:25,618 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 00:21:25,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 00:21:25,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 00:21:25,619 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 00:21:25,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 00:21:25,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 00:21:25,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:21:25,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 00:21:25,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 00:21:25,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 00:21:25,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-24 00:21:26,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 00:21:26,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 00:21:26,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 00:21:26,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 00:21:26,191 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 00:21:26,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/hhk2008.i [2021-02-24 00:21:26,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45ca280c/07998fa77027422b8c8ce7bacb5f1940/FLAG564f1613c [2021-02-24 00:21:27,126 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 00:21:27,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/hhk2008.i [2021-02-24 00:21:27,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45ca280c/07998fa77027422b8c8ce7bacb5f1940/FLAG564f1613c [2021-02-24 00:21:27,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45ca280c/07998fa77027422b8c8ce7bacb5f1940 [2021-02-24 00:21:27,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 00:21:27,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 00:21:27,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:27,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 00:21:27,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 00:21:27,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:27" (1/1) ... [2021-02-24 00:21:27,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164a3d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27, skipping insertion in model container [2021-02-24 00:21:27,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:21:27" (1/1) ... [2021-02-24 00:21:27,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 00:21:27,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 00:21:27,690 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/hhk2008.i[895,908] [2021-02-24 00:21:27,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:27,735 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 00:21:27,761 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/hhk2008.i[895,908] [2021-02-24 00:21:27,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 00:21:27,801 INFO L208 MainTranslator]: Completed translation [2021-02-24 00:21:27,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27 WrapperNode [2021-02-24 00:21:27,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 00:21:27,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 00:21:27,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 00:21:27,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 00:21:27,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27" (1/1) ... [2021-02-24 00:21:27,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27" (1/1) ... [2021-02-24 00:21:27,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27" (1/1) ... [2021-02-24 00:21:27,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27" (1/1) ... [2021-02-24 00:21:27,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27" (1/1) ... [2021-02-24 00:21:27,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27" (1/1) ... [2021-02-24 00:21:27,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27" (1/1) ... [2021-02-24 00:21:27,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 00:21:27,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 00:21:27,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 00:21:27,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 00:21:27,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 00:21:28,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 00:21:28,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 00:21:28,051 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 00:21:28,051 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 00:21:28,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 00:21:28,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 00:21:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 00:21:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 00:21:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 00:21:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 00:21:28,053 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 00:21:28,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 00:21:28,053 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 00:21:28,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 00:21:28,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 00:21:28,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 00:21:28,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 00:21:28,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 00:21:28,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 00:21:28,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 00:21:28,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 00:21:28,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 00:21:28,593 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 00:21:28,594 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 00:21:28,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:28 BoogieIcfgContainer [2021-02-24 00:21:28,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 00:21:28,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 00:21:28,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 00:21:28,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 00:21:28,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:21:27" (1/3) ... [2021-02-24 00:21:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a27ae37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:28, skipping insertion in model container [2021-02-24 00:21:28,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:21:27" (2/3) ... [2021-02-24 00:21:28,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a27ae37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:21:28, skipping insertion in model container [2021-02-24 00:21:28,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:21:28" (3/3) ... [2021-02-24 00:21:28,608 INFO L111 eAbstractionObserver]: Analyzing ICFG hhk2008.i [2021-02-24 00:21:28,618 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 00:21:28,624 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 00:21:28,647 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 00:21:28,683 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 00:21:28,683 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 00:21:28,683 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-24 00:21:28,684 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 00:21:28,684 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 00:21:28,684 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 00:21:28,684 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 00:21:28,684 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 00:21:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2021-02-24 00:21:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-24 00:21:28,718 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:28,719 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] [2021-02-24 00:21:28,720 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1427682070, now seen corresponding path program 1 times [2021-02-24 00:21:28,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:28,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206276057] [2021-02-24 00:21:28,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:28,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:28,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:28,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:28,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:29,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:29,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:29,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:29,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206276057] [2021-02-24 00:21:29,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:29,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 00:21:29,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470744713] [2021-02-24 00:21:29,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 00:21:29,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:29,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 00:21:29,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:21:29,096 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2021-02-24 00:21:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:29,220 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-02-24 00:21:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 00:21:29,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2021-02-24 00:21:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:29,234 INFO L225 Difference]: With dead ends: 53 [2021-02-24 00:21:29,235 INFO L226 Difference]: Without dead ends: 31 [2021-02-24 00:21:29,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 00:21:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-24 00:21:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-02-24 00:21:29,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-02-24 00:21:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-02-24 00:21:29,337 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-02-24 00:21:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:29,338 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-02-24 00:21:29,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 00:21:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-02-24 00:21:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-24 00:21:29,340 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:29,340 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] [2021-02-24 00:21:29,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 00:21:29,341 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1433223196, now seen corresponding path program 1 times [2021-02-24 00:21:29,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:29,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14908875] [2021-02-24 00:21:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:29,574 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:29,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:29,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:29,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 00:21:29,603 WARN L141 QuantifierPusher]: treesize reduction 13, result has 55.2 percent of original size [2021-02-24 00:21:29,606 WARN L147 QuantifierPusher]: treesize reduction 13, result has 55.2 percent of original size 16 [2021-02-24 00:21:29,640 WARN L141 QuantifierPusher]: treesize reduction 13, result has 60.6 percent of original size [2021-02-24 00:21:29,642 WARN L147 QuantifierPusher]: treesize reduction 13, result has 60.6 percent of original size 20 [2021-02-24 00:21:29,684 WARN L141 QuantifierPusher]: treesize reduction 13, result has 48.0 percent of original size [2021-02-24 00:21:29,686 WARN L147 QuantifierPusher]: treesize reduction 13, result has 48.0 percent of original size 12 [2021-02-24 00:21:29,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:29,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:29,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:29,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:29,763 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:29,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:29,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:29,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:29,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:29,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14908875] [2021-02-24 00:21:29,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 00:21:29,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 00:21:29,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888302957] [2021-02-24 00:21:29,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 00:21:29,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:29,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 00:21:29,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-24 00:21:29,871 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 9 states. [2021-02-24 00:21:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:30,412 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-02-24 00:21:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 00:21:30,413 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2021-02-24 00:21:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:30,415 INFO L225 Difference]: With dead ends: 39 [2021-02-24 00:21:30,415 INFO L226 Difference]: Without dead ends: 34 [2021-02-24 00:21:30,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-02-24 00:21:30,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-24 00:21:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-02-24 00:21:30,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-24 00:21:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-02-24 00:21:30,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2021-02-24 00:21:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:30,430 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-02-24 00:21:30,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 00:21:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-02-24 00:21:30,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 00:21:30,431 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:30,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 00:21:30,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 00:21:30,432 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:30,433 INFO L82 PathProgramCache]: Analyzing trace with hash 322329265, now seen corresponding path program 1 times [2021-02-24 00:21:30,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:30,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393042372] [2021-02-24 00:21:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:30,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:30,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:30,519 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:30,520 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:30,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:30,530 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:30,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:30,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:30,561 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:30,562 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:21:30,583 WARN L141 QuantifierPusher]: treesize reduction 13, result has 60.6 percent of original size [2021-02-24 00:21:30,585 WARN L147 QuantifierPusher]: treesize reduction 13, result has 60.6 percent of original size 20 [2021-02-24 00:21:30,605 WARN L141 QuantifierPusher]: treesize reduction 13, result has 48.0 percent of original size [2021-02-24 00:21:30,606 WARN L147 QuantifierPusher]: treesize reduction 13, result has 48.0 percent of original size 12 [2021-02-24 00:21:30,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:30,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:30,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:30,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:30,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:30,645 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:30,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:30,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:30,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 00:21:30,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393042372] [2021-02-24 00:21:30,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:30,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-02-24 00:21:30,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487827426] [2021-02-24 00:21:30,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-24 00:21:30,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-24 00:21:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-24 00:21:30,698 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2021-02-24 00:21:31,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:31,310 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-02-24 00:21:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 00:21:31,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2021-02-24 00:21:31,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:31,313 INFO L225 Difference]: With dead ends: 41 [2021-02-24 00:21:31,313 INFO L226 Difference]: Without dead ends: 36 [2021-02-24 00:21:31,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-02-24 00:21:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-02-24 00:21:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-02-24 00:21:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-24 00:21:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-02-24 00:21:31,341 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2021-02-24 00:21:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:31,341 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-02-24 00:21:31,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-24 00:21:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-02-24 00:21:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-24 00:21:31,346 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 00:21:31,346 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2021-02-24 00:21:31,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 00:21:31,347 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 00:21:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 00:21:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash 168931524, now seen corresponding path program 2 times [2021-02-24 00:21:31,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 00:21:31,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530774896] [2021-02-24 00:21:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 00:21:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:31,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,449 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:31,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 00:21:31,459 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:31,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,471 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 00:21:31,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:31,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,486 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 00:21:31,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 00:21:31,515 WARN L141 QuantifierPusher]: treesize reduction 13, result has 60.6 percent of original size [2021-02-24 00:21:31,516 WARN L147 QuantifierPusher]: treesize reduction 13, result has 60.6 percent of original size 20 [2021-02-24 00:21:31,538 WARN L141 QuantifierPusher]: treesize reduction 13, result has 48.0 percent of original size [2021-02-24 00:21:31,539 WARN L147 QuantifierPusher]: treesize reduction 13, result has 48.0 percent of original size 12 [2021-02-24 00:21:31,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:31,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 00:21:31,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,589 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:31,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 00:21:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 00:21:31,658 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 00:21:31,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 00:21:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-24 00:21:31,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530774896] [2021-02-24 00:21:31,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-02-24 00:21:31,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-02-24 00:21:31,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2459209] [2021-02-24 00:21:31,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-24 00:21:31,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 00:21:31,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-24 00:21:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-02-24 00:21:31,675 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 12 states. [2021-02-24 00:21:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 00:21:32,277 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-02-24 00:21:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 00:21:32,277 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2021-02-24 00:21:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 00:21:32,278 INFO L225 Difference]: With dead ends: 35 [2021-02-24 00:21:32,278 INFO L226 Difference]: Without dead ends: 0 [2021-02-24 00:21:32,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-02-24 00:21:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-24 00:21:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-24 00:21:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-24 00:21:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-24 00:21:32,280 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2021-02-24 00:21:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 00:21:32,280 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-24 00:21:32,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-24 00:21:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-24 00:21:32,281 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-24 00:21:32,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 00:21:32,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-24 00:21:32,721 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-24 00:21:32,721 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-24 00:21:32,721 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-24 00:21:32,722 INFO L189 CegarLoopUtils]: For program point L12-2(line 12) no Hoare annotation was computed. [2021-02-24 00:21:32,722 INFO L189 CegarLoopUtils]: For program point L12-3(line 12) no Hoare annotation was computed. [2021-02-24 00:21:32,722 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:32,722 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:32,722 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2021-02-24 00:21:32,722 INFO L192 CegarLoopUtils]: At program point L12(line 12) the Hoare annotation is: true [2021-02-24 00:21:32,723 INFO L192 CegarLoopUtils]: At program point L12-1(line 12) the Hoare annotation is: true [2021-02-24 00:21:32,723 INFO L192 CegarLoopUtils]: At program point L12-2(line 12) the Hoare annotation is: true [2021-02-24 00:21:32,723 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-24 00:21:32,723 INFO L192 CegarLoopUtils]: At program point L12-3(line 12) the Hoare annotation is: true [2021-02-24 00:21:32,724 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:21:32,724 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-24 00:21:32,724 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-24 00:21:32,724 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-24 00:21:32,724 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-24 00:21:32,724 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-24 00:21:32,724 INFO L189 CegarLoopUtils]: For program point L15-1(line 15) no Hoare annotation was computed. [2021-02-24 00:21:32,725 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:21:32,725 INFO L189 CegarLoopUtils]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:21:32,725 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-24 00:21:32,725 INFO L185 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: (let ((.cse1 (+ main_~res~0 main_~cnt~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= (+ main_~res~0 1) .cse0) (<= 0 main_~b~0) (<= .cse1 .cse0))) [2021-02-24 00:21:32,725 INFO L185 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (and (<= main_~a~0 main_~res~0) (< main_~res~0 (+ main_~a~0 main_~b~0 1)) (<= main_~res~0 main_~a~0)) [2021-02-24 00:21:32,725 INFO L192 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: true [2021-02-24 00:21:32,726 INFO L192 CegarLoopUtils]: At program point L29-1(line 29) the Hoare annotation is: true [2021-02-24 00:21:32,726 INFO L192 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-02-24 00:21:32,726 INFO L192 CegarLoopUtils]: At program point L27-1(line 27) the Hoare annotation is: true [2021-02-24 00:21:32,726 INFO L192 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: true [2021-02-24 00:21:32,726 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 24 38) the Hoare annotation is: true [2021-02-24 00:21:32,726 INFO L192 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: true [2021-02-24 00:21:32,726 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 24 38) the Hoare annotation is: true [2021-02-24 00:21:32,727 INFO L192 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: true [2021-02-24 00:21:32,727 INFO L185 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (+ main_~res~0 main_~cnt~0 1))) (and (<= (+ main_~res~0 1) .cse0) (<= .cse1 .cse0) (<= .cse0 .cse1) (<= 0 main_~b~0))) [2021-02-24 00:21:32,727 INFO L185 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: (<= 0 main_~b~0) [2021-02-24 00:21:32,727 INFO L185 CegarLoopUtils]: At program point L32-2(lines 32 35) the Hoare annotation is: (let ((.cse1 (+ main_~res~0 main_~cnt~0)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (< main_~res~0 (+ main_~a~0 main_~b~0 1)) (<= 0 main_~b~0) (<= .cse1 .cse0))) [2021-02-24 00:21:32,727 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 38) the Hoare annotation is: true [2021-02-24 00:21:32,728 INFO L185 CegarLoopUtils]: At program point L32-3(lines 32 35) the Hoare annotation is: (and (<= (+ main_~a~0 main_~b~0) main_~res~0) (< main_~res~0 (+ main_~a~0 main_~b~0 1)) (<= 0 main_~b~0)) [2021-02-24 00:21:32,728 INFO L192 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: true [2021-02-24 00:21:32,728 INFO L192 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: true [2021-02-24 00:21:32,728 INFO L192 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-02-24 00:21:32,728 INFO L192 CegarLoopUtils]: At program point L26-1(line 26) the Hoare annotation is: true [2021-02-24 00:21:32,729 INFO L192 CegarLoopUtils]: At program point L26-2(line 26) the Hoare annotation is: true [2021-02-24 00:21:32,729 INFO L192 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-02-24 00:21:32,729 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-24 00:21:32,729 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2021-02-24 00:21:32,729 INFO L185 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:21:32,730 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:21:32,730 INFO L185 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-24 00:21:32,730 INFO L185 CegarLoopUtils]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-24 00:21:32,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:21:32 BoogieIcfgContainer [2021-02-24 00:21:32,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 00:21:32,754 INFO L168 Benchmark]: Toolchain (without parser) took 5303.25 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 131.8 MB in the beginning and 154.4 MB in the end (delta: -22.6 MB). Peak memory consumption was 102.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:32,755 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 155.2 MB. Free memory is still 129.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 00:21:32,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.64 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 121.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:32,756 INFO L168 Benchmark]: Boogie Preprocessor took 87.52 ms. Allocated memory is still 155.2 MB. Free memory was 120.9 MB in the beginning and 119.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:32,757 INFO L168 Benchmark]: RCFGBuilder took 704.37 ms. Allocated memory is still 155.2 MB. Free memory was 119.6 MB in the beginning and 135.5 MB in the end (delta: -15.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:32,758 INFO L168 Benchmark]: TraceAbstraction took 4154.32 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 135.0 MB in the beginning and 154.4 MB in the end (delta: -19.4 MB). Peak memory consumption was 105.9 MB. Max. memory is 8.0 GB. [2021-02-24 00:21:32,761 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 155.2 MB. Free memory is still 129.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 334.64 ms. Allocated memory is still 155.2 MB. Free memory was 130.5 MB in the beginning and 121.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 87.52 ms. Allocated memory is still 155.2 MB. Free memory was 120.9 MB in the beginning and 119.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 704.37 ms. Allocated memory is still 155.2 MB. Free memory was 119.6 MB in the beginning and 135.5 MB in the end (delta: -15.9 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4154.32 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 135.0 MB in the beginning and 154.4 MB in the end (delta: -19.4 MB). Peak memory consumption was 105.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: ((a + b <= res + cnt && res < a + b + 1) && 0 <= b) && res + cnt <= a + b - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 116 SDtfs, 114 SDslu, 250 SDs, 0 SdLazy, 395 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 41 LocationsWithAnnotation, 62 PreInvPairs, 79 NumberOfFragments, 179 HoareAnnotationTreeSize, 62 FomulaSimplifications, 620 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 41 FomulaSimplificationsInter, 762 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 121 NumberOfCodeBlocks, 121 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 117 ConstructedInterpolants, 0 QuantifiedInterpolants, 14493 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 1/6 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...