/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invariants/mod4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:28:59,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:28:59,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:28:59,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:28:59,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:28:59,550 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:28:59,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:28:59,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:28:59,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:28:59,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:28:59,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:28:59,591 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:28:59,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:28:59,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:28:59,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:28:59,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:28:59,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:28:59,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:28:59,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:28:59,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:28:59,593 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:28:59,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:28:59,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:28:59,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:28:59,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:28:59,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:28:59,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:28:59,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:28:59,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:28:59,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:28:59,595 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:28:59,595 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:29:00,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:29:00,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:29:00,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:29:00,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:29:00,166 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:29:00,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/mod4.c [2021-05-03 00:29:00,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48f700163/982f9706a81c484793311d7deb00e5cb/FLAG287092e03 [2021-05-03 00:29:00,898 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:29:00,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c [2021-05-03 00:29:00,906 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48f700163/982f9706a81c484793311d7deb00e5cb/FLAG287092e03 [2021-05-03 00:29:01,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48f700163/982f9706a81c484793311d7deb00e5cb [2021-05-03 00:29:01,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:29:01,308 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:29:01,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:29:01,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:29:01,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:29:01,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:29:01" (1/1) ... [2021-05-03 00:29:01,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ddff1bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01, skipping insertion in model container [2021-05-03 00:29:01,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:29:01" (1/1) ... [2021-05-03 00:29:01,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:29:01,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:29:01,481 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c[351,364] [2021-05-03 00:29:01,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:29:01,511 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:29:01,532 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c[351,364] [2021-05-03 00:29:01,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:29:01,562 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:29:01,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01 WrapperNode [2021-05-03 00:29:01,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:29:01,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:29:01,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:29:01,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:29:01,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01" (1/1) ... [2021-05-03 00:29:01,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01" (1/1) ... [2021-05-03 00:29:01,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01" (1/1) ... [2021-05-03 00:29:01,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01" (1/1) ... [2021-05-03 00:29:01,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01" (1/1) ... [2021-05-03 00:29:01,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01" (1/1) ... [2021-05-03 00:29:01,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01" (1/1) ... [2021-05-03 00:29:01,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:29:01,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:29:01,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:29:01,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:29:01,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:29:01,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:29:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:29:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:29:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:29:01,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:29:01,734 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:29:01,734 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:29:01,735 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:29:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:29:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:29:01,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:29:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:29:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:29:01,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:29:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:29:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:29:01,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:29:01,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:29:01,989 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:29:01,990 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:29:01,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:29:01 BoogieIcfgContainer [2021-05-03 00:29:01,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:29:01,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:29:01,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:29:01,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:29:01,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:29:01" (1/3) ... [2021-05-03 00:29:01,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af35864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:29:01, skipping insertion in model container [2021-05-03 00:29:01,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:29:01" (2/3) ... [2021-05-03 00:29:01,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af35864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:29:01, skipping insertion in model container [2021-05-03 00:29:01,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:29:01" (3/3) ... [2021-05-03 00:29:02,001 INFO L111 eAbstractionObserver]: Analyzing ICFG mod4.c [2021-05-03 00:29:02,007 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:29:02,011 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:29:02,028 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:29:02,049 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:29:02,049 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:29:02,049 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:29:02,049 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:29:02,049 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:29:02,050 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:29:02,050 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:29:02,050 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:29:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-03 00:29:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:29:02,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:02,073 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:02,074 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:02,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1035305623, now seen corresponding path program 1 times [2021-05-03 00:29:02,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:02,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031859769] [2021-05-03 00:29:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:02,153 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:02,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:02,429 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031859769] [2021-05-03 00:29:02,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031859769] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:02,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:02,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:29:02,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109812481] [2021-05-03 00:29:02,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:29:02,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:29:02,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:29:02,461 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:02,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:02,614 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-03 00:29:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:29:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-03 00:29:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:02,634 INFO L225 Difference]: With dead ends: 32 [2021-05-03 00:29:02,635 INFO L226 Difference]: Without dead ends: 13 [2021-05-03 00:29:02,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:29:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-03 00:29:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-03 00:29:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-03 00:29:02,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-03 00:29:02,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:02,718 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-03 00:29:02,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:02,719 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-03 00:29:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 00:29:02,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:02,721 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:02,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:29:02,722 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:02,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2042096758, now seen corresponding path program 1 times [2021-05-03 00:29:02,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:02,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768637398] [2021-05-03 00:29:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:02,742 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:29:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:02,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:02,989 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:02,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768637398] [2021-05-03 00:29:02,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [768637398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:02,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:02,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:29:02,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273244374] [2021-05-03 00:29:02,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:29:02,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:02,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:29:02,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:29:02,992 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:03,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:03,398 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-03 00:29:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 00:29:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-03 00:29:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:03,400 INFO L225 Difference]: With dead ends: 20 [2021-05-03 00:29:03,401 INFO L226 Difference]: Without dead ends: 15 [2021-05-03 00:29:03,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-03 00:29:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-03 00:29:03,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-03 00:29:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-03 00:29:03,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-03 00:29:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:03,414 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-03 00:29:03,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-03 00:29:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 00:29:03,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:29:03,416 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:29:03,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:29:03,417 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:29:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:29:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash 615626395, now seen corresponding path program 1 times [2021-05-03 00:29:03,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:29:03,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738752743] [2021-05-03 00:29:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:29:03,503 INFO L181 rdanLoopAcceleration]: Guard: Formula: (and (<= 0 (+ |v_main_#t~nondet7_7| 2147483648)) (<= |v_main_#t~nondet7_7| 2147483647) (not (= |v_main_#t~nondet7_7| 0))) InVars {main_#t~nondet7=|v_main_#t~nondet7_7|} OutVars{main_#t~nondet7=|v_main_#t~nondet7_7|} AuxVars[] AssignedVars[] [2021-05-03 00:29:03,545 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size [2021-05-03 00:29:03,614 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:29:03,617 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 00:29:03,636 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-05-03 00:29:03,639 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-05-03 00:29:03,687 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 93.3 percent of original size 83 [2021-05-03 00:29:03,745 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-03 00:29:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:03,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:29:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:29:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:29:03,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:29:04,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-03 00:29:04,195 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:29:04,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738752743] [2021-05-03 00:29:04,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1738752743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:29:04,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:29:04,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-03 00:29:04,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239740482] [2021-05-03 00:29:04,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 00:29:04,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:29:04,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 00:29:04,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:29:04,205 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:29:04,581 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-05-03 00:29:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 00:29:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-03 00:29:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:29:04,583 INFO L225 Difference]: With dead ends: 18 [2021-05-03 00:29:04,584 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 00:29:04,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 458.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-03 00:29:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 00:29:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 00:29:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 00:29:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 00:29:04,587 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-03 00:29:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:29:04,588 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 00:29:04,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:29:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 00:29:04,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 00:29:04,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:29:04,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-03 00:29:04,936 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-03 00:29:04,936 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-03 00:29:04,937 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-03 00:29:04,937 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-03 00:29:04,937 INFO L194 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|)) [2021-05-03 00:29:04,937 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-03 00:29:04,937 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-03 00:29:04,938 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-03 00:29:04,938 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-03 00:29:04,938 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-03 00:29:04,938 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2021-05-03 00:29:04,938 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 11 18) the Hoare annotation is: true [2021-05-03 00:29:04,939 INFO L201 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: true [2021-05-03 00:29:04,939 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 11 18) the Hoare annotation is: true [2021-05-03 00:29:04,939 INFO L194 CegarLoopUtils]: At program point L13-1(lines 13 15) the Hoare annotation is: (<= main_~x~0 (* 4 (div main_~x~0 4))) [2021-05-03 00:29:04,939 INFO L194 CegarLoopUtils]: At program point L13-3(lines 13 15) the Hoare annotation is: (<= main_~x~0 (* 4 (div main_~x~0 4))) [2021-05-03 00:29:04,939 INFO L194 CegarLoopUtils]: At program point L13-4(lines 13 15) the Hoare annotation is: (<= main_~x~0 (* 4 (div main_~x~0 4))) [2021-05-03 00:29:04,940 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-05-03 00:29:04,940 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-05-03 00:29:04,940 INFO L194 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-03 00:29:04,940 INFO L194 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-03 00:29:04,940 INFO L201 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-05-03 00:29:04,941 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-03 00:29:04,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:29:04 BoogieIcfgContainer [2021-05-03 00:29:04,962 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:29:04,964 INFO L168 Benchmark]: Toolchain (without parser) took 3655.73 ms. Allocated memory was 198.2 MB in the beginning and 243.3 MB in the end (delta: 45.1 MB). Free memory was 164.7 MB in the beginning and 144.4 MB in the end (delta: 20.3 MB). Peak memory consumption was 65.6 MB. Max. memory is 8.0 GB. [2021-05-03 00:29:04,965 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 198.2 MB. Free memory is still 181.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:29:04,966 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.27 ms. Allocated memory is still 198.2 MB. Free memory was 164.5 MB in the beginning and 154.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:29:04,966 INFO L168 Benchmark]: Boogie Preprocessor took 55.95 ms. Allocated memory is still 198.2 MB. Free memory was 154.9 MB in the beginning and 153.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-03 00:29:04,967 INFO L168 Benchmark]: RCFGBuilder took 369.76 ms. Allocated memory is still 198.2 MB. Free memory was 153.4 MB in the beginning and 170.5 MB in the end (delta: -17.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-03 00:29:04,968 INFO L168 Benchmark]: TraceAbstraction took 2969.38 ms. Allocated memory was 198.2 MB in the beginning and 243.3 MB in the end (delta: 45.1 MB). Free memory was 170.0 MB in the beginning and 144.4 MB in the end (delta: 25.6 MB). Peak memory consumption was 71.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:29:04,969 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 198.2 MB. Free memory is still 181.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.27 ms. Allocated memory is still 198.2 MB. Free memory was 164.5 MB in the beginning and 154.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.95 ms. Allocated memory is still 198.2 MB. Free memory was 154.9 MB in the beginning and 153.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 369.76 ms. Allocated memory is still 198.2 MB. Free memory was 153.4 MB in the beginning and 170.5 MB in the end (delta: -17.2 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2969.38 ms. Allocated memory was 198.2 MB in the beginning and 243.3 MB in the end (delta: 45.1 MB). Free memory was 170.0 MB in the beginning and 144.4 MB in the end (delta: 25.6 MB). Peak memory consumption was 71.7 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2542.5ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 16.4ms, AutomataDifference: 996.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 346.5ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 36 SDtfs, 35 SDslu, 35 SDs, 0 SdLazy, 63 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 223.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 902.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 67.3ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 38 PreInvPairs, 56 NumberOfFragments, 79 HoareAnnotationTreeSize, 38 FomulaSimplifications, 53 FormulaSimplificationTreeSizeReduction, 149.2ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 569 FormulaSimplificationTreeSizeReductionInter, 166.8ms 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x <= 4 * (x / 4) - 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...