/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/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:55:09,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:55:09,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:55:09,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:55:09,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 11:55:10,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 11:55:10,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 11:55:10,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 11:55:10,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 11:55:10,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 11:55:10,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 11:55:10,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 11:55:10,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 11:55:10,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 11:55:10,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 11:55:10,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 11:55:10,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 11:55:10,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:55:10,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:55:10,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:55:10,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:55:10,051 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:55:10,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:55:10,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:55:10,054 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:55:10,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:55:10,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:55:10,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:55:10,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:55:10,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:55:10,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:55:10,055 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:55:10,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:55:10,055 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:55:10,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:55:10,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:55:10,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:55:10,056 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:55:10,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:55:10,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:55:10,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:55:10,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:55:10,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:55:10,056 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:55:10,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:55:10,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:55:10,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:55:10,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:55:10,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:55:10,293 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:55:10,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2021-05-06 11:55:10,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea0dd627/2bb35f812ee5493882511ecc6a499474/FLAG2ad6478f7 [2021-05-06 11:55:10,679 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:55:10,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2021-05-06 11:55:10,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea0dd627/2bb35f812ee5493882511ecc6a499474/FLAG2ad6478f7 [2021-05-06 11:55:10,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bea0dd627/2bb35f812ee5493882511ecc6a499474 [2021-05-06 11:55:10,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:55:10,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:55:10,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:55:10,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:55:10,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:55:10,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:55:10" (1/1) ... [2021-05-06 11:55:10,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31e4f1bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10, skipping insertion in model container [2021-05-06 11:55:10,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:55:10" (1/1) ... [2021-05-06 11:55:10,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:55:10,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:55:10,832 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c[319,332] [2021-05-06 11:55:10,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:55:10,854 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:55:10,862 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c[319,332] [2021-05-06 11:55:10,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:55:10,908 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:55:10,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10 WrapperNode [2021-05-06 11:55:10,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:55:10,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:55:10,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:55:10,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:55:10,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10" (1/1) ... [2021-05-06 11:55:10,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10" (1/1) ... [2021-05-06 11:55:10,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10" (1/1) ... [2021-05-06 11:55:10,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10" (1/1) ... [2021-05-06 11:55:10,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10" (1/1) ... [2021-05-06 11:55:10,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10" (1/1) ... [2021-05-06 11:55:10,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10" (1/1) ... [2021-05-06 11:55:10,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:55:10,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:55:10,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:55:10,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:55:10,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10" (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 [2021-05-06 11:55:11,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:55:11,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:55:11,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:55:11,016 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:55:11,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:55:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:55:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:55:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:55:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:55:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:55:11,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:55:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:55:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:55:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:55:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:55:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:55:11,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:55:11,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:55:11,183 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:55:11,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:55:11 BoogieIcfgContainer [2021-05-06 11:55:11,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:55:11,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:55:11,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:55:11,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:55:11,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:55:10" (1/3) ... [2021-05-06 11:55:11,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d97cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:55:11, skipping insertion in model container [2021-05-06 11:55:11,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:55:10" (2/3) ... [2021-05-06 11:55:11,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d97cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:55:11, skipping insertion in model container [2021-05-06 11:55:11,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:55:11" (3/3) ... [2021-05-06 11:55:11,189 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2021-05-06 11:55:11,192 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:55:11,195 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:55:11,213 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:55:11,238 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:55:11,239 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:55:11,239 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:55:11,239 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:55:11,239 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:55:11,239 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:55:11,239 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:55:11,239 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:55:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-05-06 11:55:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:55:11,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:55:11,252 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:55:11,252 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:55:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:55:11,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 1 times [2021-05-06 11:55:11,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:55:11,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599152946] [2021-05-06 11:55:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:55:11,309 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:55:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:55:11,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:55:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:55:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:55:11,436 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:55:11,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599152946] [2021-05-06 11:55:11,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [599152946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:55:11,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:55:11,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:55:11,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316274302] [2021-05-06 11:55:11,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:55:11,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:55:11,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:55:11,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:55:11,451 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2021-05-06 11:55:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:55:11,523 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-05-06 11:55:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:55:11,524 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 [2021-05-06 11:55:11,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:55:11,528 INFO L225 Difference]: With dead ends: 33 [2021-05-06 11:55:11,528 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 11:55:11,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:55:11,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 11:55:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 11:55:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2021-05-06 11:55:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-05-06 11:55:11,550 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-05-06 11:55:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:55:11,551 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-05-06 11:55:11,551 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) [2021-05-06 11:55:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-05-06 11:55:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:55:11,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:55:11,551 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:55:11,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:55:11,552 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:55:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:55:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 1 times [2021-05-06 11:55:11,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:55:11,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653736277] [2021-05-06 11:55:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:55:11,555 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:55:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:55:11,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:55:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:55:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:55:11,640 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:55:11,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653736277] [2021-05-06 11:55:11,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [653736277] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:55:11,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:55:11,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 11:55:11,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859728639] [2021-05-06 11:55:11,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 11:55:11,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:55:11,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 11:55:11,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 11:55:11,642 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2021-05-06 11:55:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:55:11,735 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-06 11:55:11,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 11:55:11,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2021-05-06 11:55:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:55:11,736 INFO L225 Difference]: With dead ends: 22 [2021-05-06 11:55:11,736 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 11:55:11,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:55:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 11:55:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 11:55:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-05-06 11:55:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 11:55:11,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 11:55:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:55:11,742 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 11:55:11,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2021-05-06 11:55:11,742 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 11:55:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 11:55:11,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:55:11,742 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:55:11,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:55:11,743 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:55:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:55:11,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1854346422, now seen corresponding path program 1 times [2021-05-06 11:55:11,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:55:11,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442051150] [2021-05-06 11:55:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:55:11,783 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.2 percent of original size [2021-05-06 11:55:11,804 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:55:11,816 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:55:15,840 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:55:19,858 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 14 [2021-05-06 11:55:23,924 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:55:23,957 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:55:24,002 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:55:24,018 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.2 percent of original size 83 [2021-05-06 11:55:24,041 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:55:24,045 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:55:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:55:24,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:55:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:55:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:55:24,140 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:55:24,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442051150] [2021-05-06 11:55:24,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [442051150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:55:24,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:55:24,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 11:55:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532870036] [2021-05-06 11:55:24,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 11:55:24,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:55:24,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 11:55:24,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 11:55:24,142 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-05-06 11:55:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:55:24,240 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-06 11:55:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:55:24,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 [2021-05-06 11:55:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:55:24,241 INFO L225 Difference]: With dead ends: 28 [2021-05-06 11:55:24,241 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 11:55:24,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-06 11:55:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 11:55:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-06 11:55:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-05-06 11:55:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 11:55:24,245 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2021-05-06 11:55:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:55:24,245 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 11:55:24,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-05-06 11:55:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 11:55:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 11:55:24,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:55:24,246 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:55:24,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 11:55:24,246 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:55:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:55:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash 309814626, now seen corresponding path program 1 times [2021-05-06 11:55:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:55:24,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71489085] [2021-05-06 11:55:24,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:55:24,257 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size [2021-05-06 11:55:24,259 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:55:24,262 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:55:28,283 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 14 DAG size of output: 1 [2021-05-06 11:55:28,501 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-06 11:55:31,617 WARN L205 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 3 DAG size of output: 1 [2021-05-06 11:55:31,639 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-05-06 11:55:31,684 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-05-06 11:55:31,876 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-06 11:55:31,892 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.8 percent of original size 78 [2021-05-06 11:55:31,924 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:55:31,927 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:55:31,933 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size [2021-05-06 11:55:31,934 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:55:31,937 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:55:32,036 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:55:32,042 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:55:32,074 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 91.3 percent of original size 73 [2021-05-06 11:55:32,092 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:55:32,100 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 92.2 percent of original size [2021-05-06 11:55:32,102 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:55:32,105 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:55:32,148 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-05-06 11:55:32,150 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-05-06 11:55:32,179 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 92.2 percent of original size 83 [2021-05-06 11:55:32,201 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:55:32,202 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:55:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:55:32,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:55:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:55:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:55:32,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:55:32,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 11:55:32,464 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:55:32,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71489085] [2021-05-06 11:55:32,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [71489085] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:55:32,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:55:32,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-06 11:55:32,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680635980] [2021-05-06 11:55:32,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 11:55:32,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:55:32,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 11:55:32,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 11:55:32,466 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-05-06 11:55:32,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:55:32,811 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-06 11:55:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 11:55:32,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 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 17 [2021-05-06 11:55:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:55:32,812 INFO L225 Difference]: With dead ends: 30 [2021-05-06 11:55:32,812 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 11:55:32,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-05-06 11:55:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 11:55:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 11:55:32,813 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) [2021-05-06 11:55:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 11:55:32,813 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-05-06 11:55:32,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:55:32,813 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 11:55:32,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-05-06 11:55:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 11:55:32,814 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 11:55:32,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-06 11:55:32,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 11:55:33,067 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 11:55:33,067 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 11:55:33,068 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 11:55:33,068 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:55:33,069 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|)) [2021-05-06 11:55:33,069 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:55:33,069 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-06 11:55:33,069 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 11:55:33,069 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 11:55:33,069 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-06 11:55:33,069 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 6 17) the Hoare annotation is: true [2021-05-06 11:55:33,069 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 6 17) the Hoare annotation is: true [2021-05-06 11:55:33,069 INFO L201 CegarLoopUtils]: At program point L15(line 15) the Hoare annotation is: true [2021-05-06 11:55:33,069 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 6 17) the Hoare annotation is: true [2021-05-06 11:55:33,069 INFO L194 CegarLoopUtils]: At program point L11(lines 11 12) the Hoare annotation is: (<= main_~z~0 (* 2 (div main_~z~0 2))) [2021-05-06 11:55:33,070 INFO L194 CegarLoopUtils]: At program point L11-2(lines 11 12) the Hoare annotation is: (<= main_~z~0 (* 2 (div main_~z~0 2))) [2021-05-06 11:55:33,071 INFO L194 CegarLoopUtils]: At program point L10-2(lines 10 14) the Hoare annotation is: (<= main_~z~0 (* 2 (div main_~z~0 2))) [2021-05-06 11:55:33,072 INFO L194 CegarLoopUtils]: At program point L10-3(lines 10 14) the Hoare annotation is: (<= main_~z~0 (* 2 (div main_~z~0 2))) [2021-05-06 11:55:33,072 INFO L201 CegarLoopUtils]: At program point L4-3(line 4) the Hoare annotation is: true [2021-05-06 11:55:33,072 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(line 4) the Hoare annotation is: true [2021-05-06 11:55:33,072 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(line 4) the Hoare annotation is: true [2021-05-06 11:55:33,075 INFO L194 CegarLoopUtils]: At program point L4(line 4) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-06 11:55:33,075 INFO L194 CegarLoopUtils]: At program point L4-1(line 4) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:55:33,075 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-06 11:55:33,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:55:33 BoogieIcfgContainer [2021-05-06 11:55:33,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:55:33,085 INFO L168 Benchmark]: Toolchain (without parser) took 22384.40 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 154.5 MB in the beginning and 205.4 MB in the end (delta: -50.9 MB). Peak memory consumption was 108.2 MB. Max. memory is 8.0 GB. [2021-05-06 11:55:33,085 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 171.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:55:33,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 206.97 ms. Allocated memory is still 188.7 MB. Free memory was 154.3 MB in the beginning and 172.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:55:33,085 INFO L168 Benchmark]: Boogie Preprocessor took 29.75 ms. Allocated memory is still 188.7 MB. Free memory was 172.7 MB in the beginning and 171.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:55:33,086 INFO L168 Benchmark]: RCFGBuilder took 243.73 ms. Allocated memory is still 188.7 MB. Free memory was 171.3 MB in the beginning and 158.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 11:55:33,086 INFO L168 Benchmark]: TraceAbstraction took 21899.21 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 157.7 MB in the beginning and 205.4 MB in the end (delta: -47.7 MB). Peak memory consumption was 111.1 MB. Max. memory is 8.0 GB. [2021-05-06 11:55:33,087 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 188.7 MB. Free memory is still 171.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 206.97 ms. Allocated memory is still 188.7 MB. Free memory was 154.3 MB in the beginning and 172.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.75 ms. Allocated memory is still 188.7 MB. Free memory was 172.7 MB in the beginning and 171.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 243.73 ms. Allocated memory is still 188.7 MB. Free memory was 171.3 MB in the beginning and 158.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 21899.21 ms. Allocated memory was 188.7 MB in the beginning and 226.5 MB in the end (delta: 37.7 MB). Free memory was 157.7 MB in the beginning and 205.4 MB in the end (delta: -47.7 MB). Peak memory consumption was 111.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21577.3ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 7.6ms, AutomataDifference: 632.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 252.3ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49 SDtfs, 75 SDslu, 76 SDs, 0 SdLazy, 178 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 169.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 592.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20.8ms AutomataMinimizationTime, 4 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 21 LocationsWithAnnotation, 51 PreInvPairs, 81 NumberOfFragments, 86 HoareAnnotationTreeSize, 51 FomulaSimplifications, 211 FormulaSimplificationTreeSizeReduction, 80.8ms HoareSimplificationTime, 21 FomulaSimplificationsInter, 889 FormulaSimplificationTreeSizeReductionInter, 157.6ms 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: 10]: Loop Invariant Derived loop invariant: z <= 2 * (z / 2) - ProcedureContractResult [Line: 6]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 4]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...