/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 07:07:26,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 07:07:26,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 07:07:26,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 07:07:26,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 07:07:26,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 07:07:26,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 07:07:26,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 07:07:26,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 07:07:26,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 07:07:26,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 07:07:26,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 07:07:26,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 07:07:26,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 07:07:26,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 07:07:26,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 07:07:26,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 07:07:26,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 07:07:26,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 07:07:26,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 07:07:26,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 07:07:26,320 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 07:07:26,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 07:07:26,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 07:07:26,324 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 07:07:26,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 07:07:26,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 07:07:26,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 07:07:26,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 07:07:26,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 07:07:26,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 07:07:26,325 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 07:07:26,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 07:07:26,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 07:07:26,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 07:07:26,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 07:07:26,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 07:07:26,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 07:07:26,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 07:07:26,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 07:07:26,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 07:07:26,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 07:07:26,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 07:07:26,327 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 07:07:26,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 07:07:26,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 07:07:26,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 07:07:26,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 07:07:26,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 07:07:26,668 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 07:07:26,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2021-05-01 07:07:26,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1c30d315/f12793ec34004d18982eb7c4f3558cf4/FLAG3faf57318 [2021-05-01 07:07:27,185 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 07:07:27,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2021-05-01 07:07:27,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1c30d315/f12793ec34004d18982eb7c4f3558cf4/FLAG3faf57318 [2021-05-01 07:07:27,210 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1c30d315/f12793ec34004d18982eb7c4f3558cf4 [2021-05-01 07:07:27,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 07:07:27,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 07:07:27,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 07:07:27,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 07:07:27,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 07:07:27,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:07:27" (1/1) ... [2021-05-01 07:07:27,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42025bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27, skipping insertion in model container [2021-05-01 07:07:27,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:07:27" (1/1) ... [2021-05-01 07:07:27,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 07:07:27,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 07:07:27,388 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-acceleration/simple_4-2.c[322,335] [2021-05-01 07:07:27,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:07:27,408 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 07:07:27,458 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-acceleration/simple_4-2.c[322,335] [2021-05-01 07:07:27,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:07:27,473 INFO L208 MainTranslator]: Completed translation [2021-05-01 07:07:27,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27 WrapperNode [2021-05-01 07:07:27,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 07:07:27,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 07:07:27,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 07:07:27,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 07:07:27,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27" (1/1) ... [2021-05-01 07:07:27,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27" (1/1) ... [2021-05-01 07:07:27,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27" (1/1) ... [2021-05-01 07:07:27,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27" (1/1) ... [2021-05-01 07:07:27,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27" (1/1) ... [2021-05-01 07:07:27,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27" (1/1) ... [2021-05-01 07:07:27,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27" (1/1) ... [2021-05-01 07:07:27,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 07:07:27,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 07:07:27,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 07:07:27,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 07:07:27,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 07:07:27,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 07:07:27,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 07:07:27,583 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 07:07:27,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 07:07:27,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 07:07:27,583 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 07:07:27,584 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 07:07:27,584 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 07:07:27,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 07:07:27,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 07:07:27,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 07:07:27,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 07:07:27,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 07:07:27,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 07:07:27,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 07:07:27,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 07:07:27,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 07:07:27,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 07:07:27,768 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 07:07:27,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:07:27 BoogieIcfgContainer [2021-05-01 07:07:27,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 07:07:27,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 07:07:27,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 07:07:27,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 07:07:27,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 07:07:27" (1/3) ... [2021-05-01 07:07:27,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4311d0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:07:27, skipping insertion in model container [2021-05-01 07:07:27,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:07:27" (2/3) ... [2021-05-01 07:07:27,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4311d0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:07:27, skipping insertion in model container [2021-05-01 07:07:27,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:07:27" (3/3) ... [2021-05-01 07:07:27,781 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2021-05-01 07:07:27,786 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 07:07:27,789 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 07:07:27,801 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 07:07:27,828 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 07:07:27,828 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 07:07:27,829 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 07:07:27,829 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 07:07:27,829 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 07:07:27,829 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 07:07:27,829 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 07:07:27,829 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 07:07:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-05-01 07:07:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 07:07:27,848 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:07:27,849 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:07:27,849 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:07:27,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:07:27,854 INFO L82 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2021-05-01 07:07:27,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:07:27,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086326428] [2021-05-01 07:07:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:07:27,917 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:07:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:28,039 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,040 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:28,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:28,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:07:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:28,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:07:28,145 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:07:28,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086326428] [2021-05-01 07:07:28,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086326428] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:07:28,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:07:28,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 07:07:28,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646952644] [2021-05-01 07:07:28,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 07:07:28,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:07:28,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 07:07:28,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 07:07:28,176 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-05-01 07:07:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:07:28,274 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-01 07:07:28,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 07:07:28,281 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 [2021-05-01 07:07:28,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:07:28,286 INFO L225 Difference]: With dead ends: 29 [2021-05-01 07:07:28,286 INFO L226 Difference]: Without dead ends: 12 [2021-05-01 07:07:28,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 07:07:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-01 07:07:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-01 07:07:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2021-05-01 07:07:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-01 07:07:28,338 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-05-01 07:07:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:07:28,339 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-01 07:07:28,339 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) [2021-05-01 07:07:28,339 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-01 07:07:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 07:07:28,340 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:07:28,341 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:07:28,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 07:07:28,341 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:07:28,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:07:28,342 INFO L82 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2021-05-01 07:07:28,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:07:28,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630948351] [2021-05-01 07:07:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:07:28,349 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:07:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:28,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:28,445 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-05-01 07:07:28,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 07:07:28,485 INFO L142 QuantifierPusher]: treesize reduction 17, result has 5.6 percent of original size [2021-05-01 07:07:28,485 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:28,486 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:28,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:07:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:28,547 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,548 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:07:28,549 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:07:28,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630948351] [2021-05-01 07:07:28,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [630948351] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:07:28,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:07:28,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 07:07:28,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782032862] [2021-05-01 07:07:28,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 07:07:28,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:07:28,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 07:07:28,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 07:07:28,556 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-05-01 07:07:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:07:28,638 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-01 07:07:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 07:07:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 [2021-05-01 07:07:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:07:28,640 INFO L225 Difference]: With dead ends: 18 [2021-05-01 07:07:28,640 INFO L226 Difference]: Without dead ends: 13 [2021-05-01 07:07:28,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-01 07:07:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-01 07:07:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-01 07:07:28,655 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) [2021-05-01 07:07:28,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-01 07:07:28,656 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-01 07:07:28,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:07:28,657 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-01 07:07:28,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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) [2021-05-01 07:07:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-01 07:07:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 07:07:28,662 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:07:28,662 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:07:28,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 07:07:28,666 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:07:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:07:28,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2021-05-01 07:07:28,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:07:28,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212156607] [2021-05-01 07:07:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:07:28,689 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,703 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:07:28,704 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< 0 (mod v_main_~x~0_8 4294967296)) InVars {main_~x~0=v_main_~x~0_8} OutVars{main_~x~0=v_main_~x~0_8} AuxVars[] AssignedVars[] [2021-05-01 07:07:28,719 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.5 percent of original size [2021-05-01 07:07:28,730 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,734 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,738 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,741 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,799 INFO L108 tifierPushTermWalker]: treesize reduction 2, result has 33.3 percent of original size [2021-05-01 07:07:28,826 INFO L108 tifierPushTermWalker]: treesize reduction 30, result has 3.2 percent of original size [2021-05-01 07:07:28,836 INFO L108 tifierPushTermWalker]: treesize reduction 16, result has 5.9 percent of original size [2021-05-01 07:07:28,893 INFO L108 tifierPushTermWalker]: treesize reduction 16, result has 5.9 percent of original size [2021-05-01 07:07:28,903 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,905 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-05-01 07:07:28,919 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,953 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,973 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,987 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,994 INFO L108 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:28,998 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.5 percent of original size 58 [2021-05-01 07:07:29,124 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-01 07:07:29,129 INFO L142 QuantifierPusher]: treesize reduction 8, result has 91.0 percent of original size [2021-05-01 07:07:29,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-05-01 07:07:29,130 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-01 07:07:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:29,199 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,200 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:29,201 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 07:07:29,215 INFO L142 QuantifierPusher]: treesize reduction 1, result has 97.3 percent of original size [2021-05-01 07:07:29,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-05-01 07:07:29,260 INFO L142 QuantifierPusher]: treesize reduction 18, result has 48.6 percent of original size [2021-05-01 07:07:29,261 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-05-01 07:07:29,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:07:29,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:07:29,287 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:29,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:07:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:07:29,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:07:29,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:07:29,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,350 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-05-01 07:07:29,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 89 [2021-05-01 07:07:29,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 07:07:29,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:29,421 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 93 [2021-05-01 07:07:29,423 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 102 [2021-05-01 07:07:32,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:07:32,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:07:32,097 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:07:32,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212156607] [2021-05-01 07:07:32,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [212156607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:07:32,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:07:32,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 07:07:32,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134936624] [2021-05-01 07:07:32,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 07:07:32,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:07:32,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 07:07:32,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2021-05-01 07:07:32,100 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 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) [2021-05-01 07:07:34,431 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-05-01 07:07:43,004 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-05-01 07:07:48,292 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-01 07:07:48,634 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-01 07:07:48,861 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-01 07:07:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:07:48,863 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-05-01 07:07:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 07:07:48,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 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 [2021-05-01 07:07:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:07:48,863 INFO L225 Difference]: With dead ends: 17 [2021-05-01 07:07:48,863 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 07:07:48,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 12225.4ms TimeCoverageRelationStatistics Valid=54, Invalid=151, Unknown=5, NotChecked=0, Total=210 [2021-05-01 07:07:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 07:07:48,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 07:07:48,865 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) [2021-05-01 07:07:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 07:07:48,865 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-05-01 07:07:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:07:48,865 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 07:07:48,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 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) [2021-05-01 07:07:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 07:07:48,865 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 07:07:48,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 07:07:48,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-01 07:07:49,124 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-01 07:07:49,287 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 5 [2021-05-01 07:07:49,440 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 7 [2021-05-01 07:07:49,471 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-01 07:07:49,471 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-01 07:07:49,471 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-01 07:07:49,472 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:07:49,472 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|)) [2021-05-01 07:07:49,472 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:07:49,472 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:07:49,472 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-01 07:07:49,472 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-01 07:07:49,472 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:07:49,472 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 12 20) the Hoare annotation is: true [2021-05-01 07:07:49,472 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 12 20) the Hoare annotation is: true [2021-05-01 07:07:49,472 INFO L194 CegarLoopUtils]: At program point L15-2(lines 15 17) the Hoare annotation is: (<= main_~x~0 (* 2 (div main_~x~0 2))) [2021-05-01 07:07:49,472 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 12 20) the Hoare annotation is: true [2021-05-01 07:07:49,473 INFO L194 CegarLoopUtils]: At program point L15-3(lines 15 17) the Hoare annotation is: (<= main_~x~0 (* 2 (div main_~x~0 2))) [2021-05-01 07:07:49,473 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-05-01 07:07:49,473 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2021-05-01 07:07:49,473 INFO L194 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:07:49,473 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))) [2021-05-01 07:07:49,473 INFO L201 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-05-01 07:07:49,473 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:07:49,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 07:07:49 BoogieIcfgContainer [2021-05-01 07:07:49,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 07:07:49,485 INFO L168 Benchmark]: Toolchain (without parser) took 22270.08 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 163.2 MB in the beginning and 215.1 MB in the end (delta: -52.0 MB). Peak memory consumption was 81.2 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:49,485 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 180.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 07:07:49,485 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.27 ms. Allocated memory is still 198.2 MB. Free memory was 162.9 MB in the beginning and 182.0 MB in the end (delta: -19.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:49,486 INFO L168 Benchmark]: Boogie Preprocessor took 33.54 ms. Allocated memory is still 198.2 MB. Free memory was 182.0 MB in the beginning and 180.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:49,486 INFO L168 Benchmark]: RCFGBuilder took 260.23 ms. Allocated memory is still 198.2 MB. Free memory was 180.4 MB in the beginning and 167.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:49,487 INFO L168 Benchmark]: TraceAbstraction took 21707.21 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 167.3 MB in the beginning and 215.1 MB in the end (delta: -47.8 MB). Peak memory consumption was 83.2 MB. Max. memory is 8.0 GB. [2021-05-01 07:07:49,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 198.2 MB. Free memory is still 180.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.27 ms. Allocated memory is still 198.2 MB. Free memory was 162.9 MB in the beginning and 182.0 MB in the end (delta: -19.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.54 ms. Allocated memory is still 198.2 MB. Free memory was 182.0 MB in the beginning and 180.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 260.23 ms. Allocated memory is still 198.2 MB. Free memory was 180.4 MB in the beginning and 167.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21707.21 ms. Allocated memory was 198.2 MB in the beginning and 238.0 MB in the end (delta: 39.8 MB). Free memory was 167.3 MB in the beginning and 215.1 MB in the end (delta: -47.8 MB). Peak memory consumption was 83.2 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, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21040.2ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 13.4ms, AutomataDifference: 16988.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 604.6ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 20 SDslu, 36 SDs, 0 SdLazy, 40 SolverSat, 15 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 6393.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 12393.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.5ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 36 PreInvPairs, 49 NumberOfFragments, 71 HoareAnnotationTreeSize, 36 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 76.2ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 554 FormulaSimplificationTreeSizeReductionInter, 511.2ms 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: 15]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) - ProcedureContractResult [Line: 12]: 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...