/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/simple_3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:47:51,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:47:51,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:47:51,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:47:51,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:47:51,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:47:51,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:47:51,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:47:51,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:47:51,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:47:51,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:47:51,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:47:51,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:47:51,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:47:51,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:47:51,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:47:51,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:47:51,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:47:51,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:47:51,531 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:47:51,532 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:47:51,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:47:51,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:47:51,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:47:51,548 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:47:51,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:47:51,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:47:51,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:47:51,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:47:51,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:47:51,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:47:51,550 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:47:51,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:47:51,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:47:51,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:47:51,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:47:51,552 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:47:51,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:47:51,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:47:51,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:47:51,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:47:51,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:47:51,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:47:51,554 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:47:51,554 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:47:52,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:47:52,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:47:52,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:47:52,040 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:47:52,043 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:47:52,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2021-02-24 04:47:52,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d62a6077/a0b59cd67cbf411eb8bb941e9ac6b889/FLAG58f69607e [2021-02-24 04:47:52,786 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:47:52,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2021-02-24 04:47:52,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d62a6077/a0b59cd67cbf411eb8bb941e9ac6b889/FLAG58f69607e [2021-02-24 04:47:53,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d62a6077/a0b59cd67cbf411eb8bb941e9ac6b889 [2021-02-24 04:47:53,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:47:53,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:47:53,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:53,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:47:53,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:47:53,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:53" (1/1) ... [2021-02-24 04:47:53,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7d454f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53, skipping insertion in model container [2021-02-24 04:47:53,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:53" (1/1) ... [2021-02-24 04:47:53,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:47:53,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:47:53,406 WARN L226 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_3-1.c[376,389] [2021-02-24 04:47:53,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:53,440 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:47:53,459 WARN L226 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_3-1.c[376,389] [2021-02-24 04:47:53,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:53,496 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:47:53,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53 WrapperNode [2021-02-24 04:47:53,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:53,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:47:53,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:47:53,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:47:53,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53" (1/1) ... [2021-02-24 04:47:53,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53" (1/1) ... [2021-02-24 04:47:53,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53" (1/1) ... [2021-02-24 04:47:53,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53" (1/1) ... [2021-02-24 04:47:53,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53" (1/1) ... [2021-02-24 04:47:53,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53" (1/1) ... [2021-02-24 04:47:53,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53" (1/1) ... [2021-02-24 04:47:53,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:47:53,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:47:53,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:47:53,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:47:53,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:47:53,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:47:53,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:47:53,732 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:47:53,732 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:47:53,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:47:53,733 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:47:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:47:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:47:53,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:47:53,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2021-02-24 04:47:53,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:47:53,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:47:53,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:47:53,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:47:53,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:47:53,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:47:53,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:47:53,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:47:54,150 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:47:54,150 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:47:54,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:54 BoogieIcfgContainer [2021-02-24 04:47:54,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:47:54,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:47:54,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:47:54,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:47:54,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:47:53" (1/3) ... [2021-02-24 04:47:54,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9cff8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:54, skipping insertion in model container [2021-02-24 04:47:54,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:53" (2/3) ... [2021-02-24 04:47:54,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9cff8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:54, skipping insertion in model container [2021-02-24 04:47:54,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:54" (3/3) ... [2021-02-24 04:47:54,178 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_3-1.c [2021-02-24 04:47:54,199 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:47:54,208 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:47:54,255 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:47:54,282 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:47:54,282 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:47:54,283 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:47:54,283 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:47:54,283 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:47:54,283 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:47:54,283 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:47:54,283 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:47:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-02-24 04:47:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-24 04:47:54,313 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:54,314 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] [2021-02-24 04:47:54,315 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:54,323 INFO L82 PathProgramCache]: Analyzing trace with hash -108989713, now seen corresponding path program 1 times [2021-02-24 04:47:54,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:54,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762842199] [2021-02-24 04:47:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:54,427 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:54,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:54,551 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:54,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:54,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:54,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:54,668 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:54,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:47:54,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762842199] [2021-02-24 04:47:54,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:54,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:47:54,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381865835] [2021-02-24 04:47:54,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:47:54,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:54,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:47:54,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:47:54,718 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2021-02-24 04:47:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:54,824 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-02-24 04:47:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:47:54,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-24 04:47:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:54,837 INFO L225 Difference]: With dead ends: 40 [2021-02-24 04:47:54,837 INFO L226 Difference]: Without dead ends: 22 [2021-02-24 04:47:54,841 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 [2021-02-24 04:47:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-02-24 04:47:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-02-24 04:47:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-02-24 04:47:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-02-24 04:47:54,912 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-02-24 04:47:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:54,913 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-02-24 04:47:54,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:47:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-02-24 04:47:54,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-24 04:47:54,915 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:54,915 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] [2021-02-24 04:47:54,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:47:54,916 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:54,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:54,917 INFO L82 PathProgramCache]: Analyzing trace with hash -113607318, now seen corresponding path program 1 times [2021-02-24 04:47:54,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:54,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122432247] [2021-02-24 04:47:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:54,934 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:47:54,977 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:47:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:47:55,002 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:47:55,032 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:47:55,032 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:47:55,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:47:55,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:47:55 BoogieIcfgContainer [2021-02-24 04:47:55,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:47:55,051 INFO L168 Benchmark]: Toolchain (without parser) took 1870.28 ms. Allocated memory is still 153.1 MB. Free memory was 130.4 MB in the beginning and 104.6 MB in the end (delta: 25.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:55,052 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 153.1 MB. Free memory is still 128.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:47:55,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.40 ms. Allocated memory is still 153.1 MB. Free memory was 129.4 MB in the beginning and 119.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:55,054 INFO L168 Benchmark]: Boogie Preprocessor took 77.26 ms. Allocated memory is still 153.1 MB. Free memory was 119.8 MB in the beginning and 118.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:55,055 INFO L168 Benchmark]: RCFGBuilder took 576.36 ms. Allocated memory is still 153.1 MB. Free memory was 118.3 MB in the beginning and 105.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:55,056 INFO L168 Benchmark]: TraceAbstraction took 893.15 ms. Allocated memory is still 153.1 MB. Free memory was 104.8 MB in the beginning and 104.6 MB in the end (delta: 165.3 kB). Peak memory consumption was 1.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:55,061 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 153.1 MB. Free memory is still 128.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 305.40 ms. Allocated memory is still 153.1 MB. Free memory was 129.4 MB in the beginning and 119.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.26 ms. Allocated memory is still 153.1 MB. Free memory was 119.8 MB in the beginning and 118.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 576.36 ms. Allocated memory is still 153.1 MB. Free memory was 118.3 MB in the beginning and 105.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 893.15 ms. Allocated memory is still 153.1 MB. Free memory was 104.8 MB in the beginning and 104.6 MB in the end (delta: 165.3 kB). Peak memory consumption was 1.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned short N = __VERIFIER_nondet_ushort(); [L17] COND FALSE !(x < N) [L21] CALL __VERIFIER_assert(x % 2) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 12 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 2 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=29occurred 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...