/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 01:59:05,000 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:59:05,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:59:05,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:59:05,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:59:05,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:59:05,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:59:05,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:59:05,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:59:05,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:59:05,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:59:05,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:59:05,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:59:05,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:59:05,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:59:05,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:59:05,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:59:05,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:59:05,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:59:05,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:59:05,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:59:05,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:59:05,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:59:05,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:59:05,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:59:05,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 01:59:05,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 01:59:05,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 01:59:05,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 01:59:05,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 01:59:05,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 01:59:05,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 01:59:05,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 01:59:05,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:59:05,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:59:05,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:59:05,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 01:59:05,167 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:59:05,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:59:05,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:59:05,171 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:59:05,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:59:05,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:59:05,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:59:05,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:59:05,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:59:05,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:59:05,173 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:59:05,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:59:05,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:59:05,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:59:05,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:59:05,174 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:59:05,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:59:05,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:59:05,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:59:05,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:59:05,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:59:05,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:59:05,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:59:05,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:59:05,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:59:05,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:59:05,839 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:59:05,840 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:59:05,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-11-07 01:59:05,946 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e7c4a239/3edbae87f1994a509f5680c2b3d3b3c4/FLAGcd2fa8971 [2020-11-07 01:59:06,753 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:59:06,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-11-07 01:59:06,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e7c4a239/3edbae87f1994a509f5680c2b3d3b3c4/FLAGcd2fa8971 [2020-11-07 01:59:07,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e7c4a239/3edbae87f1994a509f5680c2b3d3b3c4 [2020-11-07 01:59:07,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:59:07,081 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:59:07,084 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:59:07,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:59:07,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:59:07,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:59:07" (1/1) ... [2020-11-07 01:59:07,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea9818e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07, skipping insertion in model container [2020-11-07 01:59:07,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:59:07" (1/1) ... [2020-11-07 01:59:07,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:59:07,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:59:07,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:59:07,364 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:59:07,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:59:07,404 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:59:07,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07 WrapperNode [2020-11-07 01:59:07,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:59:07,407 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:59:07,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:59:07,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:59:07,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07" (1/1) ... [2020-11-07 01:59:07,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07" (1/1) ... [2020-11-07 01:59:07,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07" (1/1) ... [2020-11-07 01:59:07,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07" (1/1) ... [2020-11-07 01:59:07,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07" (1/1) ... [2020-11-07 01:59:07,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07" (1/1) ... [2020-11-07 01:59:07,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07" (1/1) ... [2020-11-07 01:59:07,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:59:07,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:59:07,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:59:07,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:59:07,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07" (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 [2020-11-07 01:59:07,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:59:07,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:59:07,549 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:59:07,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 01:59:07,550 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:59:07,550 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:59:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:59:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:59:07,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:59:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:59:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 01:59:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-11-07 01:59:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:59:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:59:07,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:59:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:59:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:59:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:59:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:59:07,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:59:07,878 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:59:07,879 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 01:59:07,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:59:07 BoogieIcfgContainer [2020-11-07 01:59:07,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:59:07,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:59:07,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:59:07,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:59:07,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:59:07" (1/3) ... [2020-11-07 01:59:07,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ccacda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:59:07, skipping insertion in model container [2020-11-07 01:59:07,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:59:07" (2/3) ... [2020-11-07 01:59:07,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ccacda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:59:07, skipping insertion in model container [2020-11-07 01:59:07,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:59:07" (3/3) ... [2020-11-07 01:59:07,928 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_2-1.c [2020-11-07 01:59:07,959 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:59:07,967 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:59:08,001 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:59:08,062 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:59:08,063 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:59:08,063 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:59:08,063 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:59:08,063 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:59:08,064 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:59:08,064 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:59:08,066 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:59:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-07 01:59:08,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-07 01:59:08,132 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:08,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:08,134 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:08,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:08,146 INFO L82 PathProgramCache]: Analyzing trace with hash 153821576, now seen corresponding path program 1 times [2020-11-07 01:59:08,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:08,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675455382] [2020-11-07 01:59:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:08,275 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:08,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 01:59:08,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675455382] [2020-11-07 01:59:08,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:08,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 01:59:08,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300398386] [2020-11-07 01:59:08,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 01:59:08,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:08,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 01:59:08,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:59:08,571 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-11-07 01:59:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:08,778 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-11-07 01:59:08,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 01:59:08,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-11-07 01:59:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:08,812 INFO L225 Difference]: With dead ends: 50 [2020-11-07 01:59:08,812 INFO L226 Difference]: Without dead ends: 28 [2020-11-07 01:59:08,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 01:59:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-07 01:59:08,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-07 01:59:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-07 01:59:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-07 01:59:08,924 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2020-11-07 01:59:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:08,924 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-07 01:59:08,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 01:59:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-07 01:59:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-07 01:59:08,931 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:08,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 01:59:08,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:59:08,932 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:08,934 INFO L82 PathProgramCache]: Analyzing trace with hash -246986538, now seen corresponding path program 1 times [2020-11-07 01:59:08,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:08,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895313516] [2020-11-07 01:59:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:08,957 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:59:09,071 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:59:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 01:59:09,144 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 01:59:09,205 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 01:59:09,206 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 01:59:09,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:59:09,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:59:09 BoogieIcfgContainer [2020-11-07 01:59:09,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 01:59:09,243 INFO L168 Benchmark]: Toolchain (without parser) took 2162.10 ms. Allocated memory is still 151.0 MB. Free memory was 128.6 MB in the beginning and 100.8 MB in the end (delta: 27.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 8.0 GB. [2020-11-07 01:59:09,246 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 124.6 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 01:59:09,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.13 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 118.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 01:59:09,256 INFO L168 Benchmark]: Boogie Preprocessor took 44.04 ms. Allocated memory is still 151.0 MB. Free memory was 118.6 MB in the beginning and 117.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-07 01:59:09,259 INFO L168 Benchmark]: RCFGBuilder took 429.45 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 102.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-07 01:59:09,261 INFO L168 Benchmark]: TraceAbstraction took 1351.44 ms. Allocated memory is still 151.0 MB. Free memory was 101.9 MB in the beginning and 100.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. [2020-11-07 01:59:09,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 124.6 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 322.13 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 118.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.04 ms. Allocated memory is still 151.0 MB. Free memory was 118.6 MB in the beginning and 117.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 429.45 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 102.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1351.44 ms. Allocated memory is still 151.0 MB. Free memory was 101.9 MB in the beginning and 100.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] unsigned int x = 1; [L19] unsigned int y = __VERIFIER_nondet_uint(); [L21] COND FALSE !(!(y > 0)) [L23] COND FALSE !(x < y) [L31] CALL __VERIFIER_assert(x != y) [L11] COND TRUE !(cond) [L12] CALL reach_error() [L3] __assert_fail("0", "phases_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 20 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...