/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/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:07:24,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:07:24,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:07:24,494 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:07:24,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:07:24,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:07:24,623 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:07:24,624 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 18:07:24,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:07:24,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:07:24,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:07:24,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:07:24,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:07:24,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:07:24,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:07:24,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:07:24,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:07:24,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:07:24,657 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:07:24,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:07:24,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:07:24,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:07:24,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:07:24,659 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:07:24,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:07:24,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:07:24,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:07:24,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:07:24,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:07:24,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:07:24,666 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:07:25,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:07:25,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:07:25,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:07:25,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:07:25,120 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:07:25,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2021-02-23 18:07:25,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9248c042c/406ae99385474e28802902b9c5fcdbbc/FLAGc0ef76edc [2021-02-23 18:07:25,884 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:07:25,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2021-02-23 18:07:25,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9248c042c/406ae99385474e28802902b9c5fcdbbc/FLAGc0ef76edc [2021-02-23 18:07:26,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9248c042c/406ae99385474e28802902b9c5fcdbbc [2021-02-23 18:07:26,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:07:26,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:07:26,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:07:26,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:07:26,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:07:26,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:07:26" (1/1) ... [2021-02-23 18:07:26,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af5031b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26, skipping insertion in model container [2021-02-23 18:07:26,279 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:07:26" (1/1) ... [2021-02-23 18:07:26,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:07:26,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:07:26,457 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i[296,309] [2021-02-23 18:07:26,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:07:26,486 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:07:26,503 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i[296,309] [2021-02-23 18:07:26,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:07:26,526 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:07:26,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26 WrapperNode [2021-02-23 18:07:26,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:07:26,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:07:26,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:07:26,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:07:26,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26" (1/1) ... [2021-02-23 18:07:26,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26" (1/1) ... [2021-02-23 18:07:26,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26" (1/1) ... [2021-02-23 18:07:26,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26" (1/1) ... [2021-02-23 18:07:26,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26" (1/1) ... [2021-02-23 18:07:26,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26" (1/1) ... [2021-02-23 18:07:26,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26" (1/1) ... [2021-02-23 18:07:26,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:07:26,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:07:26,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:07:26,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:07:26,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26" (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 18:07:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:07:26,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:07:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:07:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-02-23 18:07:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2021-02-23 18:07:26,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:07:26,722 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:07:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:07:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:07:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:07:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-02-23 18:07:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2021-02-23 18:07:26,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:07:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:07:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:07:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:07:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:07:26,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:07:26,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:07:26,968 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:07:26,969 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:07:26,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:07:26 BoogieIcfgContainer [2021-02-23 18:07:26,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:07:26,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:07:26,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:07:26,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:07:26,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:07:26" (1/3) ... [2021-02-23 18:07:26,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27488cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:07:26, skipping insertion in model container [2021-02-23 18:07:26,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:07:26" (2/3) ... [2021-02-23 18:07:26,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27488cd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:07:26, skipping insertion in model container [2021-02-23 18:07:26,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:07:26" (3/3) ... [2021-02-23 18:07:26,982 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2021-02-23 18:07:26,992 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:07:26,998 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:07:27,047 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:07:27,103 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:07:27,103 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:07:27,104 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:07:27,104 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:07:27,104 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:07:27,104 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:07:27,104 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:07:27,105 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:07:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-02-23 18:07:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 18:07:27,133 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:07:27,134 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] [2021-02-23 18:07:27,134 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:07:27,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:07:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1640950537, now seen corresponding path program 1 times [2021-02-23 18:07:27,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:07:27,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237575301] [2021-02-23 18:07:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:07:27,240 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:07:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:27,447 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:27,448 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:27,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:27,451 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:07:27,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:27,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:07:27,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:27,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:07:27,493 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:27,494 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:07:27,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:27,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:07:27,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:27,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:27,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:07:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:27,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:27,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:27,688 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 18:07:27,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237575301] [2021-02-23 18:07:27,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:07:27,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:07:27,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125354921] [2021-02-23 18:07:27,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:07:27,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:07:27,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:07:27,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:07:27,720 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 8 states. [2021-02-23 18:07:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:07:28,219 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2021-02-23 18:07:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 18:07:28,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2021-02-23 18:07:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:07:28,230 INFO L225 Difference]: With dead ends: 62 [2021-02-23 18:07:28,230 INFO L226 Difference]: Without dead ends: 37 [2021-02-23 18:07:28,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-02-23 18:07:28,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-23 18:07:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-02-23 18:07:28,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-23 18:07:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-02-23 18:07:28,286 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 22 [2021-02-23 18:07:28,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:07:28,287 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-02-23 18:07:28,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:07:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-02-23 18:07:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-23 18:07:28,289 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:07:28,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:07:28,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:07:28,289 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:07:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:07:28,290 INFO L82 PathProgramCache]: Analyzing trace with hash 394134961, now seen corresponding path program 1 times [2021-02-23 18:07:28,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:07:28,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100681021] [2021-02-23 18:07:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:07:30,448 WARN L141 QuantifierPusher]: treesize reduction 75, result has 40.5 percent of original size [2021-02-23 18:07:30,480 WARN L147 QuantifierPusher]: treesize reduction 75, result has 40.5 percent of original size 51 [2021-02-23 18:07:30,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-02-23 18:07:30,541 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:07:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:30,645 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,648 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:30,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:07:30,672 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,672 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:07:30,681 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-23 18:07:30,682 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-23 18:07:30,684 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-23 18:07:30,685 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-23 18:07:30,696 WARN L141 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size [2021-02-23 18:07:30,698 WARN L147 QuantifierPusher]: treesize reduction 3, result has 70.0 percent of original size 7 [2021-02-23 18:07:30,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:07:30,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:07:30,729 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:30,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:07:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:07:30,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:30,806 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 18:07:30,811 WARN L141 QuantifierPusher]: treesize reduction 3, result has 92.9 percent of original size [2021-02-23 18:07:30,816 WARN L147 QuantifierPusher]: treesize reduction 3, result has 92.9 percent of original size 39 [2021-02-23 18:07:30,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:07:30,832 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-02-23 18:07:30,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-02-23 18:07:30,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:07:30,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:07:30,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:07:30,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,954 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 18:07:30,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:07:30,978 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:30,979 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:07:30,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:07:31,009 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:07:31,011 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,012 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:07:31,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 18:07:31,041 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:07:31,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,045 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:07:31,046 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 18:07:31,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:07:31,077 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,078 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:07:31,079 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 18:07:31,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:07:31,102 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,103 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:07:31,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-23 18:07:31,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:07:31,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-23 18:07:31,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-02-23 18:07:31,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:07:31,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:07:31,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100681021] [2021-02-23 18:07:31,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:07:31,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-23 18:07:31,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103416124] [2021-02-23 18:07:31,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-23 18:07:31,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:07:31,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-23 18:07:31,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-02-23 18:07:31,126 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 14 states. [2021-02-23 18:07:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:07:31,617 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-02-23 18:07:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 18:07:31,617 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2021-02-23 18:07:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:07:31,618 INFO L225 Difference]: With dead ends: 34 [2021-02-23 18:07:31,618 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 18:07:31,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-02-23 18:07:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 18:07:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 18:07:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 18:07:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 18:07:31,621 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2021-02-23 18:07:31,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:07:31,622 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 18:07:31,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-23 18:07:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 18:07:31,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 18:07:31,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:07:31,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 18:07:32,282 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 18:07:32,283 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 18:07:32,283 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 18:07:32,283 INFO L192 CegarLoopUtils]: At program point L3-2(line 3) the Hoare annotation is: true [2021-02-23 18:07:32,283 INFO L192 CegarLoopUtils]: At program point L3-3(line 3) the Hoare annotation is: true [2021-02-23 18:07:32,284 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 18:07:32,284 INFO L192 CegarLoopUtils]: At program point L3-4(line 3) the Hoare annotation is: true [2021-02-23 18:07:32,284 INFO L192 CegarLoopUtils]: At program point L-1-1(line -1) the Hoare annotation is: true [2021-02-23 18:07:32,284 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2021-02-23 18:07:32,284 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 18:07:32,284 INFO L192 CegarLoopUtils]: At program point L3(line 3) the Hoare annotation is: true [2021-02-23 18:07:32,285 INFO L192 CegarLoopUtils]: At program point L3-1(line 3) the Hoare annotation is: true [2021-02-23 18:07:32,285 INFO L192 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-02-23 18:07:32,285 INFO L185 CegarLoopUtils]: At program point L20-3(lines 19 21) the Hoare annotation is: (or (forall ((v_main_~i~0_BEFORE_CALL_1 Int)) (or (not (= (ite (not (= v_main_~i~0_BEFORE_CALL_1 3)) 1 0) |check_error_#in~b|)) (and (or (not (<= 2 v_main_~i~0_BEFORE_CALL_1)) (not (<= v_main_~i~0_BEFORE_CALL_1 2))) (not (= v_main_~i~0_BEFORE_CALL_1 1))))) (= |check_error_#in~b| check_error_~b)) [2021-02-23 18:07:32,285 INFO L192 CegarLoopUtils]: At program point check_errorENTRY(lines 19 21) the Hoare annotation is: true [2021-02-23 18:07:32,285 INFO L185 CegarLoopUtils]: At program point L20(line 20) the Hoare annotation is: (or (forall ((v_main_~i~0_BEFORE_CALL_1 Int)) (or (not (= (ite (not (= v_main_~i~0_BEFORE_CALL_1 3)) 1 0) |check_error_#in~b|)) (and (or (not (<= 2 v_main_~i~0_BEFORE_CALL_1)) (not (<= v_main_~i~0_BEFORE_CALL_1 2))) (not (= v_main_~i~0_BEFORE_CALL_1 1))))) (= |check_error_#in~b| check_error_~b)) [2021-02-23 18:07:32,286 INFO L185 CegarLoopUtils]: At program point check_errorEXIT(lines 19 21) the Hoare annotation is: (or (forall ((v_main_~i~0_BEFORE_CALL_1 Int)) (or (not (= (ite (not (= v_main_~i~0_BEFORE_CALL_1 3)) 1 0) |check_error_#in~b|)) (and (or (not (<= 2 v_main_~i~0_BEFORE_CALL_1)) (not (<= v_main_~i~0_BEFORE_CALL_1 2))) (not (= v_main_~i~0_BEFORE_CALL_1 1))))) (= |check_error_#in~b| check_error_~b)) [2021-02-23 18:07:32,286 INFO L185 CegarLoopUtils]: At program point L20-2(line 20) the Hoare annotation is: (forall ((v_main_~i~0_BEFORE_CALL_1 Int)) (or (not (= (ite (not (= v_main_~i~0_BEFORE_CALL_1 3)) 1 0) |check_error_#in~b|)) (and (or (not (<= 2 v_main_~i~0_BEFORE_CALL_1)) (not (<= v_main_~i~0_BEFORE_CALL_1 2))) (not (= v_main_~i~0_BEFORE_CALL_1 1))))) [2021-02-23 18:07:32,286 INFO L192 CegarLoopUtils]: At program point __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: true [2021-02-23 18:07:32,286 INFO L192 CegarLoopUtils]: At program point __blast_assertEXIT(lines 6 9) the Hoare annotation is: true [2021-02-23 18:07:32,287 INFO L192 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: true [2021-02-23 18:07:32,287 INFO L192 CegarLoopUtils]: At program point __blast_assertFINAL(lines 6 9) the Hoare annotation is: true [2021-02-23 18:07:32,287 INFO L192 CegarLoopUtils]: At program point __blast_assertENTRY(lines 6 9) the Hoare annotation is: true [2021-02-23 18:07:32,287 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-02-23 18:07:32,287 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 18:07:32,287 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 18:07:32,287 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-02-23 18:07:32,288 INFO L185 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (or (= main_~i~0 1) (and (<= 2 main_~i~0) (<= main_~i~0 2))) [2021-02-23 18:07:32,288 INFO L185 CegarLoopUtils]: At program point L31-1(lines 26 33) the Hoare annotation is: (or (= main_~i~0 0) (= main_~i~0 1) (and (<= 2 main_~i~0) (<= main_~i~0 2))) [2021-02-23 18:07:32,288 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 35) the Hoare annotation is: true [2021-02-23 18:07:32,289 INFO L185 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (or (= main_~i~0 0) (= main_~i~0 1)) [2021-02-23 18:07:32,289 INFO L185 CegarLoopUtils]: At program point L27-1(line 27) the Hoare annotation is: (let ((.cse0 (= |main_#t~post7| main_~i~0))) (or (and (= main_~i~0 0) .cse0) (and .cse0 (= main_~i~0 1)))) [2021-02-23 18:07:32,289 INFO L185 CegarLoopUtils]: At program point L27-2(line 27) the Hoare annotation is: (and (= (+ |main_#t~post7| 1) main_~i~0) (or (= |main_#t~post7| 0) (and (<= |main_#t~post7| 1) (<= 1 |main_#t~post7|)))) [2021-02-23 18:07:32,289 INFO L192 CegarLoopUtils]: At program point mainEXIT(lines 24 35) the Hoare annotation is: true [2021-02-23 18:07:32,290 INFO L192 CegarLoopUtils]: At program point L26-2(lines 26 33) the Hoare annotation is: true [2021-02-23 18:07:32,290 INFO L192 CegarLoopUtils]: At program point mainFINAL(lines 24 35) the Hoare annotation is: true [2021-02-23 18:07:32,314 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,316 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,316 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,316 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:07:32 BoogieIcfgContainer [2021-02-23 18:07:32,321 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:07:32,328 INFO L168 Benchmark]: Toolchain (without parser) took 6064.87 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 136.8 MB in the beginning and 136.9 MB in the end (delta: -174.0 kB). Peak memory consumption was 105.8 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:32,329 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 127.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:07:32,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.25 ms. Allocated memory is still 152.0 MB. Free memory was 135.7 MB in the beginning and 126.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:32,337 INFO L168 Benchmark]: Boogie Preprocessor took 36.67 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 124.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:32,337 INFO L168 Benchmark]: RCFGBuilder took 405.68 ms. Allocated memory is still 152.0 MB. Free memory was 124.9 MB in the beginning and 124.9 MB in the end (delta: 5.5 kB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:32,338 INFO L168 Benchmark]: TraceAbstraction took 5347.27 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 124.2 MB in the beginning and 136.9 MB in the end (delta: -12.8 MB). Peak memory consumption was 94.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:07:32,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 152.0 MB. Free memory is still 127.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 256.25 ms. Allocated memory is still 152.0 MB. Free memory was 135.7 MB in the beginning and 126.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.67 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 124.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 405.68 ms. Allocated memory is still 152.0 MB. Free memory was 124.9 MB in the beginning and 124.9 MB in the end (delta: 5.5 kB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5347.27 ms. Allocated memory was 152.0 MB in the beginning and 182.5 MB in the end (delta: 30.4 MB). Free memory was 124.2 MB in the beginning and 136.9 MB in the end (delta: -12.8 MB). Peak memory consumption was 94.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 26]: Loop Invariant Derived loop invariant: (i == 0 || i == 1) || (2 <= i && i <= 2) - ProcedureContractResult [Line: 19]: Procedure Contract for check_error [2021-02-23 18:07:32,360 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,360 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,364 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,364 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,365 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,365 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,365 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] [2021-02-23 18:07:32,366 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~i~0_BEFORE_CALL_1,QUANTIFIED] Derived contract for procedure check_error: (forall v_main_~i~0_BEFORE_CALL_1 : int :: !((if !(v_main_~i~0_BEFORE_CALL_1 == 3) then 1 else 0) == \old(b)) || ((!(2 <= v_main_~i~0_BEFORE_CALL_1) || !(v_main_~i~0_BEFORE_CALL_1 <= 2)) && !(v_main_~i~0_BEFORE_CALL_1 == 1))) || \old(b) == b - ProcedureContractResult [Line: 6]: Procedure Contract for __blast_assert Derived contract for procedure __blast_assert: 1 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 SDtfs, 55 SDslu, 150 SDs, 0 SdLazy, 144 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=1, 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, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 33 LocationsWithAnnotation, 48 PreInvPairs, 67 NumberOfFragments, 234 HoareAnnotationTreeSize, 48 FomulaSimplifications, 331 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 33 FomulaSimplificationsInter, 1019 FormulaSimplificationTreeSizeReductionInter, 0.5s 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...