/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/even.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 19:04:48,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 19:04:48,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 19:04:48,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 19:04:48,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 19:04:48,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 19:04:48,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 19:04:48,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 19:04:48,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 19:04:48,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 19:04:48,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 19:04:48,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 19:04:48,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 19:04:48,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 19:04:48,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 19:04:48,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 19:04:48,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 19:04:48,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 19:04:48,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 19:04:48,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 19:04:48,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 19:04:48,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 19:04:48,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 19:04:48,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 19:04:48,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 19:04:48,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 19:04:48,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 19:04:48,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 19:04:48,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 19:04:48,653 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 19:04:48,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 19:04:48,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 19:04:48,656 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 19:04:48,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 19:04:48,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 19:04:48,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 19:04:48,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 19:04:48,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 19:04:48,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 19:04:48,658 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 19:04:48,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 19:04:48,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 19:04:48,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 19:04:48,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 19:04:48,659 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 19:04:48,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 19:04:48,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 19:04:48,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:04:48,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 19:04:48,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 19:04:48,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 19:04:48,661 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 19:04:49,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 19:04:49,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 19:04:49,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 19:04:49,051 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 19:04:49,052 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 19:04:49,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/even.c [2021-02-23 19:04:49,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00937eccf/debadb5c5e944359821415afb187c273/FLAGc047c01e0 [2021-02-23 19:04:49,722 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 19:04:49,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c [2021-02-23 19:04:49,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00937eccf/debadb5c5e944359821415afb187c273/FLAGc047c01e0 [2021-02-23 19:04:50,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00937eccf/debadb5c5e944359821415afb187c273 [2021-02-23 19:04:50,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 19:04:50,112 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 19:04:50,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 19:04:50,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 19:04:50,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 19:04:50,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:04:50" (1/1) ... [2021-02-23 19:04:50,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1969f398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50, skipping insertion in model container [2021-02-23 19:04:50,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:04:50" (1/1) ... [2021-02-23 19:04:50,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 19:04:50,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 19:04:50,297 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-invariants/even.c[351,364] [2021-02-23 19:04:50,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:04:50,318 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 19:04:50,333 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-invariants/even.c[351,364] [2021-02-23 19:04:50,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 19:04:50,352 INFO L208 MainTranslator]: Completed translation [2021-02-23 19:04:50,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50 WrapperNode [2021-02-23 19:04:50,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 19:04:50,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 19:04:50,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 19:04:50,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 19:04:50,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50" (1/1) ... [2021-02-23 19:04:50,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50" (1/1) ... [2021-02-23 19:04:50,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50" (1/1) ... [2021-02-23 19:04:50,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50" (1/1) ... [2021-02-23 19:04:50,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50" (1/1) ... [2021-02-23 19:04:50,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50" (1/1) ... [2021-02-23 19:04:50,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50" (1/1) ... [2021-02-23 19:04:50,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 19:04:50,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 19:04:50,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 19:04:50,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 19:04:50,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 19:04:50,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 19:04:50,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 19:04:50,498 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 19:04:50,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-23 19:04:50,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 19:04:50,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 19:04:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 19:04:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 19:04:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 19:04:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 19:04:50,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-23 19:04:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 19:04:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 19:04:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 19:04:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 19:04:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 19:04:50,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 19:04:50,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 19:04:50,795 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 19:04:50,796 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 19:04:50,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:04:50 BoogieIcfgContainer [2021-02-23 19:04:50,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 19:04:50,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 19:04:50,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 19:04:50,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 19:04:50,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:04:50" (1/3) ... [2021-02-23 19:04:50,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbd2865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:04:50, skipping insertion in model container [2021-02-23 19:04:50,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:04:50" (2/3) ... [2021-02-23 19:04:50,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cbd2865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:04:50, skipping insertion in model container [2021-02-23 19:04:50,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:04:50" (3/3) ... [2021-02-23 19:04:50,843 INFO L111 eAbstractionObserver]: Analyzing ICFG even.c [2021-02-23 19:04:50,854 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 19:04:50,879 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 19:04:50,906 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 19:04:50,932 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 19:04:50,933 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 19:04:50,933 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 19:04:50,933 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 19:04:50,933 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 19:04:50,933 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 19:04:50,934 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 19:04:50,934 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 19:04:50,951 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-23 19:04:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 19:04:50,961 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:50,962 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] [2021-02-23 19:04:50,962 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1714919044, now seen corresponding path program 1 times [2021-02-23 19:04:50,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:50,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310330180] [2021-02-23 19:04:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:51,069 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:51,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:51,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:51,203 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:51,204 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:51,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:51,283 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:51,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:51,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310330180] [2021-02-23 19:04:51,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:51,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 19:04:51,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915480323] [2021-02-23 19:04:51,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 19:04:51,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:51,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 19:04:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 19:04:51,327 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2021-02-23 19:04:51,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:51,427 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-02-23 19:04:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 19:04:51,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-02-23 19:04:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:51,438 INFO L225 Difference]: With dead ends: 50 [2021-02-23 19:04:51,438 INFO L226 Difference]: Without dead ends: 30 [2021-02-23 19:04:51,442 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 [2021-02-23 19:04:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-23 19:04:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-02-23 19:04:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-23 19:04:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-02-23 19:04:51,492 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 25 [2021-02-23 19:04:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:51,493 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-02-23 19:04:51,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 19:04:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-02-23 19:04:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 19:04:51,495 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:51,495 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] [2021-02-23 19:04:51,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 19:04:51,495 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:51,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1521130299, now seen corresponding path program 1 times [2021-02-23 19:04:51,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:51,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933930687] [2021-02-23 19:04:51,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:51,501 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 19:04:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:51,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:51,659 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:51,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:51,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:51,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:51,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:51,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:51,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:51,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:51,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:51,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:51,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:51,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:51,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933930687] [2021-02-23 19:04:51,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:51,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 19:04:51,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309458550] [2021-02-23 19:04:51,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 19:04:51,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:51,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 19:04:51,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 19:04:51,799 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 6 states. [2021-02-23 19:04:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:52,010 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-02-23 19:04:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 19:04:52,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-23 19:04:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:52,013 INFO L225 Difference]: With dead ends: 40 [2021-02-23 19:04:52,013 INFO L226 Difference]: Without dead ends: 34 [2021-02-23 19:04:52,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-23 19:04:52,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-23 19:04:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-02-23 19:04:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-23 19:04:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-02-23 19:04:52,027 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2021-02-23 19:04:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:52,028 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-02-23 19:04:52,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 19:04:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-02-23 19:04:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 19:04:52,029 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 19:04:52,029 INFO L422 BasicCegarLoop]: trace histogram [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] [2021-02-23 19:04:52,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 19:04:52,030 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 19:04:52,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 19:04:52,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1827953076, now seen corresponding path program 1 times [2021-02-23 19:04:52,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 19:04:52,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219023059] [2021-02-23 19:04:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 19:04:54,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:54,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 68 [2021-02-23 19:04:56,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-02-23 19:04:56,327 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 19:04:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:56,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:56,438 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 19:04:56,445 WARN L141 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-02-23 19:04:56,446 WARN L147 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size 17 [2021-02-23 19:04:56,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-23 19:04:56,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:56,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 19:04:56,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,485 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:56,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 19:04:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 19:04:56,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:56,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 19:04:56,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 19:04:56,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 19:04:56,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-02-23 19:04:56,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 19:04:56,573 WARN L141 QuantifierPusher]: treesize reduction 16, result has 85.2 percent of original size [2021-02-23 19:04:56,576 WARN L147 QuantifierPusher]: treesize reduction 16, result has 85.2 percent of original size 92 [2021-02-23 19:04:56,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-02-23 19:04:56,670 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-23 19:04:56,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-23 19:04:56,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 19:04:56,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 19:04:56,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-02-23 19:04:56,791 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,794 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-23 19:04:56,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 19:04:56,833 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 19:04:56,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219023059] [2021-02-23 19:04:56,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 19:04:56,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-23 19:04:56,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62994328] [2021-02-23 19:04:56,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-23 19:04:56,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 19:04:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-23 19:04:56,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-23 19:04:56,836 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2021-02-23 19:04:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 19:04:57,477 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-02-23 19:04:57,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 19:04:57,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2021-02-23 19:04:57,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 19:04:57,479 INFO L225 Difference]: With dead ends: 34 [2021-02-23 19:04:57,479 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 19:04:57,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-02-23 19:04:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 19:04:57,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 19:04:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 19:04:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 19:04:57,481 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-02-23 19:04:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 19:04:57,481 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 19:04:57,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-23 19:04:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 19:04:57,482 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 19:04:57,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 19:04:57,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 19:04:58,030 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-02-23 19:04:58,136 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-02-23 19:04:58,286 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 19:04:58,287 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 19:04:58,287 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 19:04:58,287 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,287 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,288 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:04:58,288 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,288 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 19:04:58,288 INFO L192 CegarLoopUtils]: At program point L3-5(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,288 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,288 INFO L192 CegarLoopUtils]: At program point L3-6(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,288 INFO L192 CegarLoopUtils]: At program point L3-7(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,289 INFO L192 CegarLoopUtils]: At program point L3-8(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,289 INFO L192 CegarLoopUtils]: At program point L3-9(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,289 INFO L192 CegarLoopUtils]: At program point L3-10(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,289 INFO L192 CegarLoopUtils]: At program point L3-11(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,289 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-23 19:04:58,289 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,290 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 19:04:58,290 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:04:58,290 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 19:04:58,290 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 19:04:58,290 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 19:04:58,290 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 19:04:58,291 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2021-02-23 19:04:58,291 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 11 18) the Hoare annotation is: true [2021-02-23 19:04:58,291 INFO L192 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-02-23 19:04:58,291 INFO L185 CegarLoopUtils]: At program point L14(line 14) the Hoare annotation is: (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (= main_~x~0 0) (let ((.cse0 (div (+ main_~x~0 (- 6)) 2))) (and (<= 0 .cse0) (<= (div (+ (* main_~x~0 (- 1)) 6) (- 2)) .cse0))) (= main_~x~0 2)) [2021-02-23 19:04:58,291 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 11 18) the Hoare annotation is: true [2021-02-23 19:04:58,292 INFO L185 CegarLoopUtils]: At program point L13-1(lines 13 15) the Hoare annotation is: (let ((.cse1 (<= 0 (+ |main_#t~nondet7| 2147483648))) (.cse2 (<= |main_#t~nondet7| 2147483647))) (or (and (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (let ((.cse0 (div (+ main_~x~0 (- 6)) 2))) (and (<= 0 .cse0) (<= (div (+ (* main_~x~0 (- 1)) 6) (- 2)) .cse0))) (= main_~x~0 2)) .cse1 .cse2) (and .cse1 (= main_~x~0 0) .cse2))) [2021-02-23 19:04:58,292 INFO L185 CegarLoopUtils]: At program point L13-2(line 13) the Hoare annotation is: (or (and (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (let ((.cse0 (div (+ main_~x~0 (- 6)) 2))) (and (<= 0 .cse0) (<= (div (+ (* main_~x~0 (- 1)) 6) (- 2)) .cse0))) (= main_~x~0 2)) (<= 0 (+ |main_#t~nondet7| 2147483648)) (<= |main_#t~nondet7| 2147483647)) (= main_~x~0 0)) [2021-02-23 19:04:58,292 INFO L185 CegarLoopUtils]: At program point L13-4(line 13) the Hoare annotation is: (let ((.cse1 (<= 0 (+ |main_#t~nondet7| 2147483648))) (.cse2 (not (= |main_#t~nondet7| 0))) (.cse3 (<= |main_#t~nondet7| 2147483647))) (or (and (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (let ((.cse0 (div (+ main_~x~0 (- 6)) 2))) (and (<= 0 .cse0) (<= (div (+ (* main_~x~0 (- 1)) 6) (- 2)) .cse0))) (= main_~x~0 2)) .cse1 .cse2 .cse3) (and .cse1 .cse2 (= main_~x~0 0) .cse3))) [2021-02-23 19:04:58,292 INFO L185 CegarLoopUtils]: At program point L13-5(lines 13 15) the Hoare annotation is: (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (= main_~x~0 0) (let ((.cse0 (div (+ main_~x~0 (- 6)) 2))) (and (<= 0 .cse0) (<= (div (+ (* main_~x~0 (- 1)) 6) (- 2)) .cse0))) (= main_~x~0 2)) [2021-02-23 19:04:58,293 INFO L185 CegarLoopUtils]: At program point L13-6(lines 13 15) the Hoare annotation is: (or (and (<= 4 main_~x~0) (<= main_~x~0 4)) (= main_~x~0 0) (let ((.cse0 (div (+ main_~x~0 (- 6)) 2))) (and (<= 0 .cse0) (<= (div (+ (* main_~x~0 (- 1)) 6) (- 2)) .cse0))) (= main_~x~0 2)) [2021-02-23 19:04:58,293 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-23 19:04:58,293 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-02-23 19:04:58,293 INFO L185 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:04:58,293 INFO L185 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-02-23 19:04:58,293 INFO L185 CegarLoopUtils]: At program point L7-1(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:04:58,293 INFO L192 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-02-23 19:04:58,294 INFO L185 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-02-23 19:04:58,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:04:58 BoogieIcfgContainer [2021-02-23 19:04:58,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 19:04:58,314 INFO L168 Benchmark]: Toolchain (without parser) took 8212.73 ms. Allocated memory was 153.1 MB in the beginning and 189.8 MB in the end (delta: 36.7 MB). Free memory was 128.9 MB in the beginning and 100.4 MB in the end (delta: 28.5 MB). Peak memory consumption was 102.5 MB. Max. memory is 8.0 GB. [2021-02-23 19:04:58,314 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 127.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 19:04:58,315 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.53 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 19:04:58,316 INFO L168 Benchmark]: Boogie Preprocessor took 35.16 ms. Allocated memory is still 153.1 MB. Free memory was 118.5 MB in the beginning and 117.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 19:04:58,317 INFO L168 Benchmark]: RCFGBuilder took 407.66 ms. Allocated memory is still 153.1 MB. Free memory was 117.1 MB in the beginning and 103.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-02-23 19:04:58,318 INFO L168 Benchmark]: TraceAbstraction took 7512.76 ms. Allocated memory was 153.1 MB in the beginning and 189.8 MB in the end (delta: 36.7 MB). Free memory was 102.5 MB in the beginning and 100.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 76.3 MB. Max. memory is 8.0 GB. [2021-02-23 19:04:58,321 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 153.1 MB. Free memory is still 127.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.53 ms. Allocated memory is still 153.1 MB. Free memory was 127.8 MB in the beginning and 118.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.16 ms. Allocated memory is still 153.1 MB. Free memory was 118.5 MB in the beginning and 117.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 407.66 ms. Allocated memory is still 153.1 MB. Free memory was 117.1 MB in the beginning and 103.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7512.76 ms. Allocated memory was 153.1 MB in the beginning and 189.8 MB in the end (delta: 36.7 MB). Free memory was 102.5 MB in the beginning and 100.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 76.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (((4 <= x && x <= 4) || x == 0) || (0 <= (x + -6) / 2 && (x * -1 + 6) / -2 <= (x + -6) / 2)) || x == 2 - 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, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.5s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 53 SDslu, 148 SDs, 0 SdLazy, 119 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 52 PreInvPairs, 68 NumberOfFragments, 341 HoareAnnotationTreeSize, 52 FomulaSimplifications, 337 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 38 FomulaSimplificationsInter, 698 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...